I think the big thing for me about leftists who don't mask is like, if you won't subject yourself to that mild inconvenience how are you going to expect me to believe you won't rat us all out to the feds if you get busted? You'll risk jail to protect your comrades but you won't put some paper over your face because it doesn't feel nice and requires effort? I'm sure you'll last ages in interrogation. I'm sure a plea bargain would never tempt you.
You're telling me if you can't make rent this month and a cop tells you he'll give you £5k in cash for some video footage of our meeting you'll turn him down... But if you get asked to wear a mask you just can't bring yourself to endure such hardship? Ok babe.
At this point if you have the info and don't act on it I just assume you're a snitch.