I'd say they're about even, frankly. Don't forget that since Islam takes all the heat these days, domestic terrorists (in large part) get to fly under the radar. In addition to fundamentalist Muslims, militia groups, white supremacists and other hate groups, and far right anti-abortionists have all committed recent acts of domestic terrorism. Maybe they just don't get the press that they should.
I'd say they're about even, frankly.
-----
Hardly. Your bias is showing -- the DU crowd would probably welcome your unrealistic bias. Good Luck.