Bambi, the Earth heats up and cools down.
Duh.
Nobody contests that.
The degree of it and the consequences of it this time are more dire than the last time it heated up as much as it is currently heating.
Even if you want to believe your nitwit radio host that it is not man-made this time around, the results of it are problematic for the 100s of millions living by the coastlines of our oceans. The die-off of species is problematic to the food chain.
It is not enough to say "Oh, it will go down again; it always has." Between now and when it goes down again will be cataclysms and you? You want to sit by and say "it won't affect me, so why do anything about it?"
Your willful ignorance is revolting.