I was hesitant to add politics and religion (or other divisive topics) to my general forum until I implemented an "ignore" forum feature so that people could hide it entirely.Imho, politics ruined general topic forums for me.
It gives people the power to discuss politics, or to have a place completely removed from politics, but can captivate an audience of both as it's essentially like "changing the TV channel" when something they don't like comes on.