While I imagine there is some bias among reddit's staff, because they're people and we all have bias, I don't think it's as simple as "right leaning = bad, left leaning = good". No one there is going to give you a hard time for discussing the influence of Catholicism on the views of William F. Buckley. Even Ann Coulter is in bounds, but the vile far-right 4chan garbage that some corners of reddit spew has no place in a civil forum.