Reading the actual study says:
> Since 1990, far-right extremists have committed far more ideologically motivated homicides than far-left or radical Islamist extremists, including 227 events that took more than 520 lives.[1] In this same period, far-left extremists committed 42 ideologically motivated attacks that took 78 lives.
Link: https://archive.is/2024.10.24-222147/https://nij.ojp.gov/top...
Um... there was this thing called "September 11". It was after 1990. Out of the three named groups, 520 killed does not put them at the top.
The left only killed 15% as many people as the right. That is noteworthy. But saying that "Since 1990, far-right extremists have committed far more ideologically motivated homicides than... radical Islamist extremists" has to be massively cherry-picking the data.
key word is domestic
It's still a massive cherry-pick.
But I suppose it might depend on the point of the study. If the point is "what dangers should people in the US be worried about", then it's absolutely a cherry-pick. If international terrorists kill you, you're still just as dead. But if the point is "where should law enforcement focus its efforts", and if international terrorism is not the responsibility of the same people, then the distinction matters.
Note "not a responsibility" is different from "not primarily the responsibility".