My observations, and of course that is all they are, is the mask issue lines up pretty well with your politics. At 2 of my shops where I have members who are a little more in line with progressive thinking and we can have actual intelligent conversations about politics, the issues surrounding mask-wearing have been pretty much non-existent. Not a lot of pushback, and people more or less comply. At the shops I have that I know have the most trumpers the complaining about wearing masks has been almost non-stop. And for the one intelligent argument (the employer needs to keep an ample supply of surgical type masks because they are meant to be worn for brief periods and need to be replaced if they get wet) I have 19 stupid ones (my nose is stuffed up, it is a violation of my 4th amendment rights, masks cause covid -- which 3 months ago you were telling me was a hoax, masks are proven ineffective, etc).
As for people reacting poorly in public when someone confronts them about NOT wearing a mask, well some people will react poorly when confronted about anything. I don't particularly want to get shot at, so when I see someone in public without one, I just avoid them. I am not going to confront them. I really feel sorry for retail employees who are asked to be the mask police. It isn't fair.