Neurosciences would very much beg to differ. That ignorant clown didn't believe in the existence of empathy because he was a sociopath and had none.

Kirk then said that “sympathy” is a better term

If anything, it makes him look worse.

A narcissist can be sympathetic in a limited selfish sense, imagining how they would feel in a certain situation, and they can even feign sympathy in situations where they themselves would feel nothing.

But empathy is largely beyond them, which is why Kirk was uncomfortable with the word.

"Sympathy is a feeling of sincere concern for someone who is experiencing something difficult or painful. Empathy involves actively sharing in the person’s emotional experience."

https://www.merriam-webster.com/grammar/sympathy-empathy-difference

Kirk apparently didn't understand it. Or maybe he did and wanted to justify sociopathy.

You lack empathy, you are a sociopath.

“Biden should be tried and/or executed for crimes against America”

Personally, I suspect that Charlie Kirk didn’t really believe in a lot of the ideas that he put out there. He may have started out as a young zealot, but he grew to recognize that he got more attention (and money) the more outrageous he became. Ultimately, he was just a talented grifter who appealed to stupid, ignorant, and venal lowlifes - much like Trump. It wouldn’t surprise me if he ultimately expected to be Trump’s successor. It is outrageous that we’re expected to pay homage to this horrible person.

Kirk said “some amazing patriot should bail Paul Pelosi’s assailant out of jail”