Why can't we disagree?

Why is it that nowadays if we disagree with the status quo we're called HATERS and are made "bad guys"? I don't dislike or even personally have a problem, for example, with gay people but sincerely believe it's not right or "normal". The schools and media want to teach my son that it is and, when I teach him differently, we are considered BAD. When did we lose our right to disagree?