Im not seeing it split on party lines. There are lots of Republicans and conservatives who are for wearing masks, and there are lots of Republicans/ Conservatives who are against wearing them. The Democrats are universally for wearing them.
Right, Democrats are almost universally for them while Republicans are divided. That’s the split. My guess is if you drilled into the Republican numbers, you’d find the most opposed to masks also tend to be the most conservative. Likewise I’ll bet the most liberal Democrats are even more heavily in favor of them than Democrats at large. That’s why I say there’s an ideological piece to it.