These people clearly need to leave the planet, then. Just to insure their own survival.
I ask climate loons all the time when they speak with me- why do you remain part of the problem you believe exists?
I tell them if they really think the planet is in peril then stop flying, driving and most of all, stop breathing. Every time you wake up in the morning you are putting the planet in further peril according to your beliefs!!!
I encourage them to become part of the solution by ending it all rather than remain part of a problem they believe exists!!!