Didn't like the guy, but he was just a guy expressing a horrible opinion. Violence was not the answer.
It sounds like more of a loaded question than a problematic answer.
https://www.snopes.com/fact-check/transgender-mass-shootings...
>Even one mass shooting is too many.
This is a misrepresentation of the exchange. "Do you know how many are trans" "Too many" doesn't imply that there would be fewer mass shooting, it implies that the situation would be better if the same amount of mass shootings were happening, but the identities of the shooters would be different.
But in this current case, the speaker's political background fits the interpretation perfectly, so I don't think that we need to explain it away.