I think you may be on to something here. But I think that in terms of US politics, the stabilizing factor was that, until recently, both parties shared the same religion. Even up to the 90's, being Christian was very much a requirement for Democratic presidential candidates.

Hard disagree. The visible entity is still human, and can be wrong, even if it takes a lot to recognize it. God's can't be wrong whatever they do, however inhuman it is.

I think it used to be the former, and is now more like the latter. And I think that as Christianity, independent of the GOP, continues to be less of a political force, you will see a brand of Republican religion without reference to Christianity. I think the beginnings of this can be seen in the purging of Liz Cheney, who, until very recently, was a canonical Republican. Now it is basically heretical in the Republican party to go against Trump. Also Trump is the first Republican presidential candidate that I can remember who didn't make a show out of his Christian faith, and didn't seem to be hurt by it.