@ube Because political/philosophical discussions no longer happen in "containment zones". I still remember forums and a lot of forums had subforums dedicated to heated discussions and anyone who was willing to participate was expected to come with an open mind and anyone who didn't wish to participate could enjoy the rest of the forum.
Now everyone is expected to pick a side or at least pretend to and politics is no longer contained to a certain section but is lumped with everything else. Everyone comes across it whether you like it or not.