We all are entitled to our opinions but there is a huge difference between a private opinion and a public opinion.
Private opinions are based on cultural bias, ignorance, hubris and vanity. Yes. you are entitled to believe in the tooth fairy despite all facts denying its existence. But when you start shouting it to the four winds and to deceptively convince people you not only know what you are talking about but that they should believe in everything you say, you have crossed the boundary into that realm where madness lives. And in the process, those who are not weak of mind nor heart will know for certain that you are a fool.
Thus, here is my little piece of free advice to all self-appointed pundits out there: Check your facts and make sure you are not an ignorant sod.