I generally don't like being against things. Here's an example:
Anti-semitism is quite evil. However, I am not anti-anti-semitism. Rather, I am pro-Jewish.
The difference is between fighting a cause, and simply living my life and recognising the value in good things, and supporting those things.
I do not consider incidental "opposition" (opposing things that get in the way of doing something nice) or explaining why something is wrong to try and help someone understand stuffz better to violate this principle.