This is why you have to point out O’Donnell’s foolishness early and often:

Are you telling me separation of church and state’s in the First Amendment? It’s not. Christine O’Donnell was absolutely correct – the First Amendment says absolutely nothing about the separation of church and state.“
–Rush Limbaugh

And he’s right…if your requirement for Constitutional legality is based on applying some sort of misguided Biblical Inerrancy to the Constitution and its legal meanings, then you’re going to be disappointed re: church and state. This is, not coincidentally, also why the very same Tea Klanners see a major difference between:

separation between church and state

–and–

separation of church and state

These are seen as completely different statements. And one of those two is coming at you straight from Hitler. And you want the facts to matter?
That the establishment clause of the first amendment implicitly creates a separation between church and state is unimportant to the Tea Klan. They are reading this as the literal string of words and most definitely not for any deeper meaning. We don’t want to cast our lot in with a bunch of pointy-headed lawyers, now do we? The words separation, of, church, and state do not appear. Period. Furthermore, "In God We Trust” is on the currency; the Tea Klan worships Lord Jesus, so that word “God” must mean Christian God and not, say, Tiamat, God of Chaos. That it was put there relatively recently is utterly unimportant: the facts do not matter. It is there; we are a movement made up of Christians, therefore the US must be an inherently christian nation, (because some of the founders were, in fact, Christians) and thus we should be, on that basis, ruled by christian laws, morals, and ideals.

Look, the Tea Klan has about 10 preferred narratives. You’re not going to beat any of them based on the facts or some sober assessment of the deeper meanings of the Constitution and its amendments. The facts simply do not matter.
The only way you beat these memes is by linking them inextricably in the minds of the broader populace with outright lunacy. As soon as anyone starts talking about nullifying the 17th amendment, you need a large fraction of the population to link that with nuts like O’Donnell and instantly, reflexively turn off. Oh, 17th amendment again, that is a rube’s issue, this person must be a nut just like that know-nothing O’Donnell. Wait, didn’t I hear Sharon Angle talking about that same crap? That makes me uncomfortable, no matter how strong she is on the menace of Social Security. Hey, why is the GOP nominee for President yapping on about the 17th amendment just like that crazy woman did? Thus ends the Tea Klan.