You're of course always entitled to your opinion, but just because it is an opinion doesn't make it impervious to being labeled as unfounded or ignorant. You can expect people to challenge your opinions with facts or their own opinions when your opinions appear to have no basis, and just saying "OPINION" is not going to increase the credibility of your claims.
If you have no interest in backing up your opinions and don't care if people think less of you for it, then I don't see why you bother stating your opinions at all.
So, no, we're not happy.