Seriously i have provided citations from major international publications with quotes of their sources in intelligence agencies all over the world, and best you could come up with is a quote from a German public-service television broadcaster with 16% reach in Germany citing an "expert in maritime security"?
You have not provided a single citation, where officials say that they have proof, that Ukraine is behind it. Because there is no proof that Ukraine is behind it. All, you have presented are guesses, "could be", "might be", "looks like" or similar. You are just hiding behind your weak "Ukrainian boat" story...
Keep insisting on it to defend your beloved war criminal in the Kremlin.
Pretty weak from the start but if your whole hypothesis is resting on this, lets take a look.
That's once again a lie from you because I've never said this. Stop making up things but lying seems to be your hobby... 
In order to blow up the pipelines, investigators estimate that around 500 kilograms of TNT equivalent would be needed per explosion. Exactly how much was used cannot be said because it is unclear which explosive was used was used.
Published 16 March 2023 with "enormous doubts about the one-ship theory" of your expert mostly resting on the half a ton of TNT equivalent. And just two month later on 26 May 2023 this was published, completely destroying your little theory.
According to SPIEGEL information, the metadata of an e-mail that was sent when the Andromeda 5+ sailing yacht allegedly used to transport the explosives was rented leads to Ukraine.
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There is also repeated talk of a so-called "false flag" operation by Russia. Among those familiar with the process, this is considered extremely unlikely. Behind the scenes, it was even said early on that Moscow had no real motive for the crime.
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In the cabin of the "Andromeda" the remains of an explosive suitable for use under water were found over a large area. It is said to be octogen, an explosive that is widespread in both the West and the former Eastern bloc. Investigators have described the explosive power of the explosive charges used as equivalent to 500 kilograms of TNT.
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Oktogen is much lighter than TNT, could be transported by a relatively small boat, and could have been taken to the bottom of the Baltic Sea by experienced combat divers. The often-put-up thesis that the assassins could only have brought the explosives to the site of the attack because of its weight with a larger ship and possibly a mini-submarine is no longer applicable Intelligence services suspect Ukrainian perpetrators
…
There is also repeated talk of a so-called "false flag" operation by Russia. Among those familiar with the process, this is considered extremely unlikely. Behind the scenes, it was even said early on that Moscow had no real motive for the crime.
…
In the cabin of the "Andromeda" the remains of an explosive suitable for use under water were found over a large area. It is said to be octogen, an explosive that is widespread in both the West and the former Eastern bloc. Investigators have described the explosive power of the explosive charges used as equivalent to 500 kilograms of TNT.
…
Oktogen is much lighter than TNT, could be transported by a relatively small boat, and could have been taken to the bottom of the Baltic Sea by experienced combat divers. The often-put-up thesis that the assassins could only have brought the explosives to the site of the attack because of its weight with a larger ship and possibly a mini-submarine is no longer applicable Intelligence services suspect Ukrainian perpetrators
In case of a Russian false flag operation, it would have been a very easy thing from Russia to leave these traces intentionally on that rented "Ukrainian boat" to create this story and afterwards cry "Ukraine is evil and behind it". And loyal Putin serfs, like you are one, are doing the rest to push this story again and again.
It's not surprising that Putin's war crimes apologists in the West have selected the "Ukrainian boat" theory because it's such a nebulous story and perfectly suited for Putler's approach to sow discord among Ukraine's allies, why not providing any valid proof. It's a story that nebulous that Putin's loyal servs can accuse Ukraine of anything.
You are a perfect tool for Putin to commit more war crimes in Ukraine and it's really surpsrising how vehemently you are trying to accuse Ukraine without having any solid proof.
Everyday a new post, today 2 new posts, so we are at post number 9 defending Putler.
Do you do any research at all before posting something? Or you just enjoy being embarrassed? Are you saying SPIEGEL is Russian propaganda now? Do you think they're lying to you? Did you contact them explaining how you disagreed with their theory and told them what you thought really happened? Did they laugh?
In opposite to you, I'm doing research and also thinking about it if it's making sense or not. You are obviously lacking any critical thinking skills or why are you pushing this weak story now in over half a dozen posts, again and again? Putin really likes to have such loyal serfs like you because without you, he would be able to kill much less Ukrainians. People like you are the problem why Putin feels emboldened to invade Ukraine because people like you would keep purchasing cheap gas, funding Putins aggression and let him take whole Ukraine.
Shame, shame...
And you should read the forum rules and avoid pyramid quotes as well...
But reading is not your strength, obviously...
Bottom line, there is no proof. My personal view - Russia most likely did it. My guess is that Ukraine would not damage infrastructure that mostly benefits Germany - an ally - and could stop EU aid if detected. Yes, I will write it again, the NS benefited mostly Germany.
It not even benefitted Germany anymore. When the pipelines were blown up, Germany had decided to abandon Russian gas, so all the pipelines would have been unseless anyways even if they'd still exist. Also important to note, that 2 pipelines of NS1 were blown up but only 1 pipeline of NS2. 1 pipeline from NS2 is still intact.
And - no surprise - shortly after the explosions, Putin suggested to open the remaining NS2 pipeline.
Putin offers Europe gas through Nord Stream 2 - DW - 10/12/2022
Quote
The Russian leader offered to resume gas supplies through parts of the pipelines that weren't damaged by explosions last month.
Not suspicious, that one pipeline is still intact and Putin wants to start his NS2 project to keep Germany dependent and fund his russian war machine - not suspicious at all.
So the only citation of "enormous doubts" you provided from back in March was refuted by new information released since then. You provide zero new sources, just childish attempts to seed more doubt and uncertainty. I'm just a messenger posting news from the western media, yet instead of attempting to address why would all major newspapers suddenly publish a "nebulous story and perfectly suited for Putler's approach to sow discord among Ukraine's allies" you just continue with your silly personal attacks on me for posting the news? So, on one hand we have SPIEGEL claiming that "false flag" considered extremely unlikely, and Moscow had no real motive for the crime, and on another we have 1miau ignoring everything and pushing his false flag conspiracy theory with the super reliable source of
Think we can all decide who we trust more on this one.