I agree with your first sentence.
I might rephrase the second one, "This idea ought to transcend American political partisanship, insofar as all politicians ought to be criticized for things like Farrakhan-supporting and apologizing to wrathful anti-American gods irrespective of their political affiliations. However, no law should ever demand that they refrain from speaking their mind when it comes to religious matters; that is to say, politicians enjoy protection from the first amendment." In other words, when running for election, their religious views aren't immune from scrutiny, but the law permits them to hold whatever view they like before and after their election to the legislature.
In the final sentence, are you meaning to say that you don't think her belief in her nutbaggery is sincere? I don't doubt that some politicians present themselves as more religious than they really are for the purposes of getting elected or reelected more easily, but you don't have to be "Michele Bachmann-religious" to get elected.