Looks like they've been calling themselves Eurosceptic since 2013, and called for Dexit at least since 2019.
14 Apr 2013 The Guardian
06.09.2013 Spiegel
You are making that mistake again: one or even a few people in a party demanding one thing isn’t the party line at all. 14 Apr 2013 The Guardian
Quote
Joachim Starbatty speaks out as breakaway Eurosceptic party Alternative für Deutschland holds founding conference
...
One of Germany's most eminent economists has called for the swift dissolution of the eurozone in its present form, arguing that the vision of a united Europe is in danger of imploding if debt-ridden countries are not shown the door.
...
Therefore it would be better if these countries that are not competitive, like Greece, Ireland, Spain, Italy, etc, were to leave." An alternative, he argued, would be for Germany to leave.
...
https://www.theguardian.com/world/2013/apr/14/german-economist-eurozone-eu...
One of Germany's most eminent economists has called for the swift dissolution of the eurozone in its present form, arguing that the vision of a united Europe is in danger of imploding if debt-ridden countries are not shown the door.
...
Therefore it would be better if these countries that are not competitive, like Greece, Ireland, Spain, Italy, etc, were to leave." An alternative, he argued, would be for Germany to leave.
...
06.09.2013 Spiegel
Quote
Anti-Euro Party Surges Before Election
...
By sticking to its simple, euroskeptic line, the AfD has inhabited a gap in the political market.
...
When asked whether the anti-euro party could enter the Bundestag, Schöppner says: "That's impossible for me to say."
https://www.spiegel.de/international/germany/alternative-for-germany-anti-euro-party-could-upset-german-election-a-920805.html...
By sticking to its simple, euroskeptic line, the AfD has inhabited a gap in the political market.
...
When asked whether the anti-euro party could enter the Bundestag, Schöppner says: "That's impossible for me to say."
If you think AfD has been of one and the same opinion in 2013, you are misguided. Even the fascist Bernd Höcke has been into AfD in 2014. But politicians demanding to break away from the EU / supporting far right propaganda were a minority back then and their opinions weren’t the party line back then. The party line in 2013 was to reform the EU, not leave it. And reforming also included to bring back Deutsche Mark.
The party line later shifted to abolish the EU, but that wasn’t the party line in 2013.
In addition: Eurosceptic ≠ Break away from the EU
Eurosceptic: sceptical of how Euro is managed by ECB, sceptical how the European Parliament is making politics, sceptical how Germany was paying money to Italy / Greece....
Things are much more nuanced than in your limited world view.
13 Jan 2019 The Guardian
Exactly, 2019, the party line was to abolish the EU. Quote
AfD party votes to campaign for German exit from EU
...
The decision on Sunday marks the first time any party has called for “Dexit” – a German departure from the EU in the mould of Brexit.
If the EU is not reshaped in line with the party’s ideas “in an appropriate timeframe”, Germany must leave the bloc, according to the draft manifesto for the forthcoming European parliament elections agreed by delegates at a party congress in the eastern state of Saxony.
...
Congress attendees also voted through a call to abolish the European parliament – the very body that AfD candidates will be campaigning to join this spring.
https://www.theguardian.com/world/2019/jan/13/afd-party-to-campaign-for-german-exit-from-european-union...
The decision on Sunday marks the first time any party has called for “Dexit” – a German departure from the EU in the mould of Brexit.
If the EU is not reshaped in line with the party’s ideas “in an appropriate timeframe”, Germany must leave the bloc, according to the draft manifesto for the forthcoming European parliament elections agreed by delegates at a party congress in the eastern state of Saxony.
...
Congress attendees also voted through a call to abolish the European parliament – the very body that AfD candidates will be campaigning to join this spring.
2013 ≠ 2019
Quote
NATO Vows Retaliation for Attacks on Infrastructure
...
NATO vowed retaliation Thursday for attacks on the critical infrastructure of its 30 member nations, while strongly suggesting the rupture of two Baltic Sea pipelines meant to send natural gas from Russia to Germany was the direct result of sabotage.
Ambassadors to NATO, the West's key military alliance, said in a statement, "Any deliberate attack against allies' critical infrastructure would be met with a united and determined response." They said four ruptures in the pipelines were of "deep concern."
https://www.voanews.com/a/nato-vows-retaliation-for-attacks-on-infrastructure-blames-sabotage-for-pipe-blasts-/6769142.html...
NATO vowed retaliation Thursday for attacks on the critical infrastructure of its 30 member nations, while strongly suggesting the rupture of two Baltic Sea pipelines meant to send natural gas from Russia to Germany was the direct result of sabotage.
Ambassadors to NATO, the West's key military alliance, said in a statement, "Any deliberate attack against allies' critical infrastructure would be met with a united and determined response." They said four ruptures in the pipelines were of "deep concern."
Second thing: attacking NATO infrastructure should not be accepted at all and it doesn't matter if it's obsolete soon or newly build (or both
).