if the US so much as shoots a fire cracker on Iranian soil iran will light up their 5th fleet that's a nice sitting duck right across Bahrain. it will attack all of their bases, slaughter their troops all over the region, and absolutely break the image of the US navy (as their own wargames have shown glimpses of)
as for history. Arabs were savages who had their short run. Iran is one of the few super powers on earth that returned 4-5 times and either became one of the worlds superpowers/regional superpower . When your a superpower for thousands of years, there is inevitably going to be a period of time where yourhaving a weak leader coincides with somebody else being on the rise
it happens, nobody is invincible as history shows. Savages managed to defeat iran once. consider yourself very lucky that iran was in unbelievable turmoil at that exact point. regardless of the rise of arab savages. if arabs had attacked when iran was in a strong positon (for example during shapur 2 reign). I assure you history would have looked a lot different....,