I worked backstage security at a celebrity theater back in the late 70's - early-80's. Among the many people I met, George Carlin was one of the nastiest to those around him. That always stuck with me, and, although he had some funny routines, I never really gravitated toward him after that. The anti-NRA commentary and the anti-Christianity stuff didn't help improve my thoughts about him, or course. Compared to me, he looked pretty old even back then, so I am amazed he was only 71 when he passed on.
Last year, he was on that Bill Maher show (you know, the one where they pit two liberals and a shill audience against one conservative (usually ill-prepared). He would interrupt the right-wing guest, and say stuff like "Left me educate you, and tell you why you're wrong". Same old nasty George, R.I.P!!