So often, "politics" just means "stuff I don't like." People don't think of "stuff I do like" as politics. And that's not a right-wing phenomenon. It's common across the political spectrum.

(This isn't me spouting "both sides" nonsense. The poster in that screenshot is a bigoted dumbass and a horrible human being. I'd have a lot more respect for someone quitting a Pokemon community that was rife with anti-LGBT bigotry even if the reason they gave was "it was too political". It's still frustrating to see the term "politics" (mis?)used in that way by people I otherwise respect, though.)

Everything's politics. "That's too political" is a copout non-statement. Have the guts to say what you mean.