Perceptions of Regional Anti-Semitism

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Muslims, unlike Christians, are not "naturally" anti-semitic. Modern Muslim anti-semitism has its roots in political doctrines aligned with National Socialism, and the attendant racial arguments are then used to support it.

Would understanding the thinking in the above quote shed light on what would appear to be a preference of Israel and her supporters in the US, for Islamists of varying militancy over secular nationalist governments?

This is if someone were sincerely perplexed by this perceived preference and pattern, and struggled to understand why.

Over the last 2,000 years Jews living under Muslim control were generally far safer than those living under Christian. I think the ultimate realisation of that fact can go without saying.

How much of this was under Persian rule?

Didn't Cyrus the Great free the Jews from Babylonian Captivity, and helped to rebuild the Temple? History shows that Iran and Israel are natural ally, geography further shapes both nations strategic thinking, how much is this going to drive Iran's actions? Ideology will only take a regime so far, Ahmadinejad of course has kooky ideas, but will they trump conflicting historical and geographical realities?

Again, just what exactly is the Farsi idiom for to "wipe [something] off the face of the map"? Does such an expression really exists in Persian culture?

This is what confuses the heck out of me, I perceive a gap between rhetoric of the Iran threat and a historical and strategic reality that contradicts it. Any of this hold water?