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.
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.