There is value in dissenting opinions no matter how annoying they may be. You can always choose not to listen. Unfortunately there seems to be a growing number of people who don't want you to even have a different opinion than theirs. Not only are you not free to voice your opinion, you're not free to have it, and if you either have it or voice it, these Correctness Stasi (in Communist East Germany the Ministry for State Security) will punish you.
Did you read Orwell's 1984?
In George Orwell's novel Nineteen Eighty-Four, the Two Minutes Hate is a daily period in which Party members of the society of Oceania must watch a film depicting the Party's enemies (notably Emmanuel Goldstein and his followers) and express their hatred for them.
So value your free speech and speak, and write, freely.