Should I spend an hour explaining in detail, only to have my comment be auto-censored again just like the last one was?
It wasn’t auto censored. And you didn’t explain anything, you made a silly and provably false statement and were understandably downvoted almost immediately. Just like if you were to claim the moon landing was faked.
What would you explain? Alarmism needs exaggerated alarm, which isn't found in the earlier comment. One could project their own worries about a warming globe onto the comment, perhaps, but that alarm would stem from within oneself, not the comment. Another might see a warming globe as the best thing that could ever happen and there is nothing in said comment that would dismiss that.