To write is to reveal oneself.
When I write something, fiction or non-fiction, I do not expect you to accept what I write, nor to agree with what I propose.
I expect you to spend at least a tenth of a second to think about it - may be not about the characters, nor about the piece, but at least about the idea.
Read things you're sure will disagree with your current thinking. If you're a die-hard anti-animal person, read Meat. If you're a die-hard global warming advocate, read Glenn Beck. If you're a Rush Limbaugh fan, read James W. Loewen's Lies My Teachers Told Me. It'll do your mind good and get your heart rate up.
Although others can devalue who we are and what we do it is entirely up to us, whether we accept or reject it. Whenever we disagree with the offered opinion we can thank for it and then move on. There is no need to prove at all that we have a different perception of ourselves from what we are being offered.