I think that it would be mostly invisible if you weren't of the right, but it's there.
You vastly underestimate the perceptiveness of others.
Also, since mods that are participating in the threads and seem generally left leaning, I think a lot of the low grade insults and sweeping generalizations are just not even registering with them. I suppose that answer to that is to report them
Yes it is. If you don't report it, we don't get to know what you find bothersome, and what you don't. That being said, I have already had some conversations about things that I have seen going askew, so it isn't like we are proceeding blithely along ignoring things.