Nazi Germany for a time had the world’s most potent army and air force. Iran couldn’t overrun Iraq when they still had the Shah’s first class military hardware. People can argue the danger Iran can pose through Hezbollah and other terrorist activities, but they’re nothing like the world power that Neville Chamberlain faced at Munich.
Moreover, Hizbollah's primary target isn't the United States. A lot of people seem to conflate Israel's conflicts and national security concerns with ours. They aren't one and the same and never have been.
Remember how Slobadon Milosevic was supposedly "the new Hitler." As I recall, Hitler controlled just about everything from the North Sea to the Ural Mountains. Milosevic couldn't even hold onto a chunk of the Balkans the size of New York state. And Bashar Assad, the latest "Middle Eastern Hitler" and allegedly a mortal threat to US National Security, can't even defeat a group of rag-tag rebels in Allepo. Some "Hitler" he is.