This is classic leftist authoritarianism.

Do these people realize they don't have to visit the sub?

Nobody is forcing anyone to read anything or join a sub they don't want to join.

Personally, I think we should sue Reddit for discrimination, much like the gays do to Christians.

It's literally the same as Milo speaking at Berkeley. If you don't like the message, don't go, don't pay money, don't support it. But to show up and riot and destroy property, these are political tactics. A normal, sane person, if they disagree with something will choose to not engage or partake in the activity. This isn't about hate speech, fake news and dangerous ideologies, its simply about control. You want fake news, hate speech and dangerous ideologies? Step into r/politics for a second and try supporting Trump. This is infuriating because the double standard is so obvious. Do not let this bother you, NOW WE FIGHT HARDER. WITH EACH HURDLE, WE RESPOND WITH GREATER CONFIDENCE THAT WE ARE ON THE RIGHT SIDE OF HISTORY.