Everybody is going to have an opinion on you; not everyone is going to like you. You can't live your life based on other people's opinions of you or let that change what you do or how you feel about yourself, because then you're not living.
We have no reason to think that climate change is harmful if you look at the world as a whole. Most places, in fact, are better off being warmer than being colder. And historically, the really bad times for the environment and for people have been the cold periods rather than the warm periods.