Not so much hatred, really. Lots of great comedian have anger and have done drugs or do them. It does not bother me. He was not known for getting in trouble or hurting anybody, so the drugs are a mute point. He was an original, with a quick well organized mind, who used his talent, intellect and comedic viewpoint on the world around him, to rise to the top of his profession.
Again, you cannot change what the world thinks of George Carlin. Like I said, he hurt nobody, I am aware of. It is kind shallow and tasteless to attack the dead in general, as I was raised that way. This is especially true of someone who brought laughter, without harm.