> Iran's funding for these groups is a part of its 'defense in depth' strategy
That's the rationalisation. Not a justification. Defence in depth was Hitler's rationale for invading Russia, is Israel's strategy for pacifying neighbors, and is Russia's excuse for invading Ukraine.
Creating weak neighbors is checklist-item one for any classical aspiring land empire. It's also tremendously destabilising to its neighbourhood. (It's not a coincidence that China and Russia are bordered by (a) shitshows or (b) countries militarily posturing against them.)
> Hitler's rationale
Ah yes, give any discussion enough time and Hitler inevitably gets to be whoever your opponent is.
Unlike Hitler, unlike Israel and unlike the US, Iran has not proactively attacked.
Hitler had no reason to fear attack from Russia, Czechoslovakia or France. Iran has every reason to fear an attack from the US and Israel, look at what is happening right now ffs.
Western governments provide funding and shelter for extremist Iranian groups like People's Mojahedin Organization of Iran and various separatists movements inside the country, so please spare me this Hitler nonsense.