Yeah, you have to go back a long way to even meet that number in the United States because terrorism through mass killing is rare (and a lot of ideology based spree killings are not called terrorism).
2016: Pulse, individual inspired by ISIS propoganda
2015: San Bernardino, couple inspired by ISIS propoganda (with heavy signs of personal grudges outside terror)
2009: Fort Hood, individual inspired by War on Terror
2002: Beltway Sniper, pair of serial killers that were called jihadists just because
2001: duh
1995: OK bombing, white nationalist
1975: LGA bombing, white nationalist (Croatian nationalists)
1927: Bath school disaster, white dude with unclear intentions
1921: Tulsa race riots, white nationalists
1920: Wall Street bombing, anarchists
So if you narrow the scope you have 5 Islamic, 3 white nationalists, 1 angry white guy, and 1 set of anarchists. However, if you add in the many, many, many terror attacks involving white nationalist circles the history of this country extending back centuries.
Even this is shaky, because the beltway sniper was a serial killer and not an Islamic terrorists. However the period of time it took place was what got it lumped in with terrorists. The prosecution never presented that way, and the dominant killer attribute jihad and The Matrix as equal weight for what he did.
