No one is obligated to like what you write or agree with it. They may well express their dislike or disagreement in harsh terms. That is one of the risks you take in publishing anything. How the hell can a published author not learn to live with this? And why make an ass out of yourself by saying things you then have to apologize for. And, if that's what you felt like saying and went ahead and said it, why apologize? Either don't say it in the first place or stand by it.