And which politics? American internal politics are foreign and distant to me. How much do you care about my country internal affairs? Probably not much. And it's OK, you can't fix every country in existence, and if you tried to care you would get insane.
Also, I totally understand pruning back discussion that is political, and way off the topic of the actual post/story. People should reasonably be able to read and discuss a non-political story without big political discussion springing up.
Oh how I wish this were true of non-Americans.