Basically, yes. Most people are not mentally able to switch parties. They are fully invested in their belief-system. It’s too much to expect. They will admit they were duped and that the money was unclean, but not that they were wrong in substance. The phrase for this is ‘cognitive dissonance’. Maybe there’s a newer term for it now, but that’s what it was in the 80’s.
I imagine their thinking would be something like “just because Putin paid me doesn’t make him or me a bad person.” - blah blah blah, etc. On the right, they’re basicially anarcho-capitalist, so anything that interrupts the buyer-bought relationship is unclean, and so they may follow the law, but they won’t believe in it. They don’t believe in external authorities as a general rule, and certainly not if it’s from the other party.