People (both individuals and as groups such as corporations) have freely decided that they do not want to donate their resources to providing a platform for people to advocate genocide or to systematically denigrate 50% or more of the population. What's wrong with that? If those are the ideas you wish to freely exchange you're welcome to set up your own site, but I am not going to pay for your bandwidth.

Everyone "signals." Signaling is a fundamental aspect of social behavior. I don't care much about signaling and tend to ignore it as background noise. It's the real ideas that matter. The dominant ideas on Voat and /pol/ are political totalitarianism, dogmatic biological determinism, hatred for huge groups of people, and even advocacy of slavery and genocide.

There are toxic "left" communities that advocate totalitarianism and are full of hate as well, but they don't seem quite as common or as popular.

You must really hate 4chan (or, at least, the racist boards there) if you expect this level of nuance and understanding in discussion. It's certainly not within a million miles of what /b/ or /pol/ extend to anyone else.

Reddit? Voat is completely unusable to me because every comment is tainted with a racist agenda. It is inescapable across their whole site.