[LexiMax]

It's not so much that they didn't reason themselves into a position, as much as that they actually _do_ have a reason - just not the one they're telling you.

If anything, it reminds me of an X-Y problem. They don't really believe Y, but they are a single issue voter on X, so if their party takes Y position they feel obligated to take it as well.

And often, if you dig enough, the X that I keep encountering is the desire for a christian nationalist ethnostate. It's something they'll readily admit to if you aren't combative and just keep asking questions in the tradition of socratic irony.