Why stop with removing their access to Reddit? Why not make it downright illegal to talk about it? Why don't we make it illegal to think about it, too?
I'm exceptionally left-leaning and I don't agree with removing these people from Reddit, it's censorship of views we don't like, plain and simple. Are we really so childish that we believe that if we stop these people talking about it then the problem will go away? They'll just move elsewhere and common discourse will be more difficult, people will be more entombed in their own biased beliefs.