I mean, the United States is something like 75% white, so its mostly white. Right?
The problem is batshit crazy racists, violent gun-obsessed lunatics, and other combo mental health/social indoctrination problems.
And yes, by statistics those people are 75% likely to be white, too. And wouldn't you know it, stats for mass shootings show that's pretty accurate.
https://www.statista.com/statistics/476456/mass-shootings-in-the-us-by-shooter-s-race/
Maybe we all need to stop blaming race for everything. Maybe it's just America.