I wouldn't vote for Pete because I feel sorry for him. I would vote for him if I felt he was the best housemate and deserved to win.
There doesn't really see a lot to feel sorry for. He's smart, he's funny, seems cheerful most of the time and the ladies obviously love him. Hell there's more reason for jealousy than pity.
I do see the point about people voting for what's PC and shows you as being "open-minded" but when it leads to someone as downright awful as Nadia winning a series that was full of much better characters, you really have to draw the line.