It’s just bad data in so many ways, they count left wing anarchists as right wingers. There’s one instance where a man killed his family and himself and the motive had nothing to do with his politics. Later they found “anti-government” literature in his car so it counted as a “right wing extremist” killing. A huge number of white supremacists killings are from prison gangs. Not to mention that this doesn’t count attempted killings like the congressional baseball shooting, or much of this decade