So, looking at this chart:
https://qz.com/1182778/the-far-right-was-responsible-for-the-majority-of-extremist-killings-in-2017/
...another thing a person could criticize about your claims is your use of the word "disproportionate". Non-hispanic whites are the largest single demographic in the US, making up about 62% of the US population. Muslims make up about 1% of the population. It seems that there are more deaths by Muslim extremists relative to the population size of muslims than far-right white supremacists relative to the population of whites. I mean, obviously there are a lot of whites and there are a lot of muslims out there who are not violent extremists. But there are a lot more whites out there, so a lot more out there to become violent extremists, so in some respects its not surprising that so many of them. Obviously this is a superficial analysis, but it seems that Muslim extremist violence is actually much more disproportionate, but that extremist far-right violence is a bigger problem in absolute terms.
EDIT: Just another thing, going back to
this link Reid posted and specifically
this chart about school shootings, the distribution by ethnic/racial identity actually isn't far off from the racial breakdown of the country. So I'm a little disinclined to talk about disproportionality there, too, although it doesn't seem entirely unfair to use the word.
I mean, to the extent that this is the psychological profile of mass shooters:
[/I][/COLOR]You'd expect that this psychological profile is fairly evenly distributed across racial lines. I mean, I think there is reason here to doubt an interpretation I'm finding all over the Twittersphere, where the key motivating factor of this violence is white fear of a loss of political status.