Everyone is entitled to an opinion. There doesn't need to be evidence. It is, after all, an opinion.

However, if verifiable facts (I refrain from defining "fact"!) are not involved, everyone is entitled to an opinion. Yes, all those freaks, losers, call them what you will, who strangely have an opinion that is unacceptable, illogical, or just downright stupid... Guess what? They probably think your opinion is the same.

No-one is right. That's what an opinion is. A view. That's all. Believe what you want. Accept that other people are allowed the same. If you don't agree with them, you can argue against them. But never tell them they're not allowed to have their opinion. Do so & you just told yourself the same thing...