That's what the propaganda wants you to believe.

The problem with Israel is its radical ideology called Zionism. The Zionists believe that anybody who is not a Zionist (a race that you can only be born into from your mother side) is an animal and has to be treated that way. (This is why they murder anybody including children so violently and without remorse).
They also believe that the world population must not exceed 1 billion and they should cleanse the earth from non-Zionists which means murdering 7 out of every 8 human being on the planet and enslave the rest.

What they call "Greater Israel" is eventually a global dominating power that rules the earth.

This is the problem Iran and any other country in the world who knows what Zionism cult stands for has with Israel.
Otherwise Iran as the oldest civilization on earth that has deep rooted cultural and ideological links in half the world has had "influence" for thousands of years and that influence doesn't need protection specially from something as insignificant as Israel that is a foreign and unwanted object injected into the world.

In mid-July 1941, just weeks after Germany launched what Hitler had proclaimed to be a “war of annihilation” against the Soviet Union, a German noncommissioned officer wrote home from the eastern front:

The German people owe a great debt to our Führer, for had these beasts, who are our enemies here, come to Germany, such murders would have taken place that the world has never seen before … What we have seen … borders on the unbelievable … And when one reads Der Stürmer [a Nazi newspaper] and looks at the pictures, that is only a weak illustration of what we see here and the crimes committed here by the Jews.

An army propaganda leaflet issued in June 1941 paints a similarly nightmarish picture of Red Army political officers, which many soldiers soon perceived as a reflection of reality:

Anyone who has ever looked at the face of a Red commissar knows what the Bolsheviks are like. Here there is no need for theoretical expressions. We would insult the animals if we described these mostly Jewish men as beasts. They are the embodiment of the satanic and insane hatred against the whole of noble humanity … [They] would have brought an end to all meaningful life, had this eruption not been dammed at the last moment.

Two days after the Hamas attack, defence minister Yoav Gallant declared, “We are fighting human animals, and we must act accordingly,” later adding that Israel would “break apart one neighbourhood after another in Gaza”. Former prime minister Naftali Bennett confirmed: “We are fighting Nazis.” Prime minister Benjamin Netanyahu exhorted Israelis to “remember what Amalek has done to you”, alluding to the biblical call to exterminate Amalek’s “men and women, children and infants”. In a radio interview, he said about Hamas: “I don’t call them human animals because that would be insulting to animals.” Deputy Knesset speaker Nissim Vaturi wrote on X that Israel’s goal should be “erasing the Gaza Strip from the face of the Earth”. On Israeli TV he stated, “There are no uninvolved people … we must go in there and kill, kill, kill. We must kill them before they kill us.” Finance minister Bezalel Smotrich stressed in a speech, “The work must be completed … Total destruction. ‘Blot out the remembrance of Amalek from under heaven.’” Avi Dichter, agriculture minister and former head of the Shin Bet intelligence service, spoke about “rolling out the Gaza Nakba”. One Israeli 95-year-old military veteran, whose motivational speech to IDF troops preparing for the invasion of Gaza exhorted them to “wipe out their memory, their families, mothers and children”, was given a certificate of honour by Israeli president Herzog for “providing a wonderful example to generations of soldiers”. No wonder that there have been innumerable social media posts by IDF troops in Gaza calling to “kill the Arabs”, “burn their mothers” and “flatten” Gaza. There has been no known disciplinary action by their commanders.