This is nothing surprising. Wilbon has been pretty open about not liking the Cowboys for the longest time.
He's a lifelong Bears fan but having worked in DC he sort of has a thing for the Skins as well and I guess he adopted their hatred of Dallas.
I have no issue with this. I wish more sports people would just openly admit they hate certain teams instead of trying to be fake in front of the camera. Some open honesty here is a breath of fresh air in my book.