The demographics are not easily discerned.
We know that half are committed by and against black people.
I have read that when “Hispanics” (whatever that means) are victims, they are counted as “Hispanic” but when they are perpetrators they are counted as “white”.
When Japanese Americans were kept as a separate category, Japanese in America had homicide rates lower than Japanese in Japan, which has very low rates indeed.
Murder is fundamentally cultural, and the rates of homicide are not changed very much by access to weapons.
“The demographics are not easily discerned.”
Perhaps so, but this map may give some insight. Manipulating the “race” catagory of victims is interesting.