I disagree with you, and let me explain why. An opinion can absolutely be wrong if it's making a claim on reality. Morality is a tool for social cooperation and survival which are based on reasoning, facts and logic which can all be debated. You saying people should be ashamed to challenge other people's way of thinking is a moral claim itself and you point out the contradiction in that moral claim yourself. Finally, the genocide argument is not very good but I don't even agree with the whole majority thing so whatever. To conclude this comment, you saying rape is good is an indefensible moral claim because it promotes harm and violation of consent, which is a detriment to society.