I know I sounded glib in GGP, but that bit about global warming is pretty close to the only thing Carlin said that ever really pissed me off. For a comedian that’s as close to perfect as you can expect.
I think you need to listen to those bits again, because he was clearly saying we were going to be screwed by our own actions. ie, yes, we're potentially causing our own demise with global warming. Same with the PTSD one- his point was that adding more euphemisms was not helping those who were/are suffering.
He is sorely missed.