At first I though you were trolling, but now I'm actually concerned that you are serious, so let me get this straight.
It is normal for people to tell you to shut up, nobody wants to hear such poor and ill-intentioned opinions.
You are free to say whatever you want, but you are not free of consequences, especially when all you do is being rude, that's annoying and doesn't help, if you want to give your opinion next time do it in a constructive way.