Opinions. Everyone has them. Nothing is wrong with having opinions and point of views--everyone is entitled to them. Therefore, we shouldn't prosecute others for their own.
I'll admit, I sometimes voice my opinions in such a manner that it sounds like I am saying, "I'm right, you're wrong." But I don't think that. You probably have different views than me, and we're just going to have to agree to disagree.
Opinions are not facts, nor are they right or wrong. So next time someone has different views than you on a certain topic, rather than accuse them of being wrong or insult them, calmly explain your side of the debate, why you think that way, and just get on with your life!