1. Age its irrelevant, nobody is blaming naivete, old people can and will make mistakes all the the time, get off the high horse im sure you have your fair share just like the rest.
2. Sure its part of his online persona, he makes that clear but you are making the wrong link by assuming he said nigger as a troll. In his response video you could tell he was mad at him self for being a dumb ass and bringing all the media attention to himself, he might be troll but he hates giving them traffic/material more.
3. Dark humor and using derogatory words as insults are completely different. Not everybody abides by the npc imposed bibble, not everybody cares about political correctness.