I'm not sure what part of my comment argued against that?

People who don't care about being stupid or extremists or whatever else aren't going to be stopped by using their real name, since they by definition don't care. If they did care, then them using their real name would have prevented them from posting inane opinions online.

I'm of the opinion that you shouldn't let those opinions prevent you from posting your own freely. Discard them, ignore them, block them, whatever, and then go about with your life as if you never saw them.