You may want to be careful , you are libelling his wife with those statements (and you'd be libelling him except legally you can't libel the dead). If you can't provide evidence of the Kirks being nazi, sociopathic and racist, or you may want to retract those legally-actionable statements.
He did not preach hatred. He spoke of welcoming gay people, for instance, with open arms.
He was against DEI - well in it's current warped form, where a middle class white man wearing a skirt has become more important than a Muslim woman needing to change in a single sex changing room, so do I. That's not even slightly a neo nazi belief.
He believed empathy wasn't possible as you can't feel some else's feelings, you can only have sympathy for them - I don't agree but again, not sociopathic or Nazi.
He didn't say gun deaths were ok, he said he understood that allowing the public access to guns would mean more gun deaths than if it was banned, but he thought that was the better option than the alternative- again I don't agree, but Americans have a very different relationship to guns than we do. He compared it to banning cars, if we banned cars no kids would be killed by being hit by a car but we (as a society) decide we'd rather have cars and so some kids will be hit by them. He didn't say kids getting shot or hit by cars was ok.
Please share where he said black people should be slaves. I haven't seen anything like that.
He said his opposition to abortion was so strong he'd rather his daughter have to have a baby by rape than an abortion. Again, I disagree with him, but he's far from alone in the US to hold those views - are millions of Americans Nazis? He was less of a hypocrite than those politicians who vote to ban abortion in their states, even for raped 10 year olds, while quietly shipping their own unwantedly-pregnant relatives to states where it's still legal.
I don't care about her or her grief, and I think his daughter had a lucky escape. Is a far more sociopathic thing to say than anything I've seen of Charlie Kirks. Disagree with his views, I do too, but to say that about a grieving woman and a small child who will not know her father says who you are.