They also go the other way:

• Conservative gets into shoving match with Antifa member that punched him in the face: Right-wing terrorist attack
• Antifa counter-protestors throw bricks at police during Conservative protest: Right-wing terrorist attack
• Klansman beats his girlfriend to death in a trailer park: Right-wing terrorist attack

I'm basically just going to repeat what we posted in this other thread that most Leftist terrorism isn't acknowledged as Leftist, or even acknowledged as terrorism, even if Leftists cause and explicitly state that the violence is for political change.

Most people do not even know how much Leftist terrorism there has been, have never heard of the attacks, or only know about law enforcement responses to terrorist attacks because it's more acceptable to the narrative