There is no doubt that America, as a very young nation and given her founding principles have, thus far been the exception to the rule. There is also a deep Christian belief in the Bible where many Christians felt that G-d honors those who honor the Jews so we have that element in America as well.
You are 100% correct that Aetheist-Communist-Socialist regimes have spilt more blood (Jewish as well) than any other type in history.
So, I agree that America's Protestant tradition is part & parcel with American Exceptional ism but we ARE witnessing a huge rise in world Antisemitism supposedly due to Israel defending herself.
>> we ARE witnessing a huge rise in world Antisemitism supposedly due to Israel defending herself.
Yes, and it is the single most disturbing development in my lifetime. In my 70+ years on this earth, I have never once heard antisemitism preached from a pulpit, but now it oozes from university leftist slime pits and indoctrinates our impressionable youth on a daily basis.
I pray that G-d deliver us from the horrors to come.