Well, no. Agree with what you agree with, disagree with what you disagree with.
Disagreeing with or criticising EVERYTHING someone says or does, even if you agree with it...well, that's just silly.
It just happens that most of what Wenger says is cr*p hence the reason I disagree with him.
I don't disagree for the sake of it btw, just don't believe in the things he says and does.