What we would find - which I'm sure is exactly what you predicted - is that a majority of Republicans believe it--about 65%--while a negligible number of Democrats do. (In fact, I've yet to find a study that cites any significant percentage of Democrats believing the Big Lie.)
So,.. as you point out, about 65% of Republicans are frickin' gawdamned idiotic uninformed ignorant brainless morons (believe the Big Lie).
Got it!
You are correct on that point!