Antifa isn't always non-violent. But if you compare apples-to-apples with right-wing extremists, it's not even close.

You know who else likes to use vehicles in terrorist attacks? Reactionary, anti-liberal Muslims.

How true

"It is hard to resist the conclusion that this enemy is on many counts the projection of the self; both the ideal and the unacceptable aspects of the self are attributed to him. The enemy may be the cosmopolitan intellectual, but the paranoid will outdo him in the apparatus of scholarship, even of pedantry. Secret organizations set up to combat secret organizations give the same flattery. The Ku Klux Klan imitated Catholicism to the point of donning priestly vestments, developing an elaborate ritual and an equally elaborate hierarchy. The John Birch Society emulates Communist cells and quasi-secret operation through “front” groups, and preaches a ruthless prosecution of the ideological war along lines very similar to those it finds in the Communist enemy. Spokesmen of the various fundamentalist anti-Communist “crusades” openly express their admiration for the dedication and discipline the Communist cause calls forth."

https://harpers.org/archive/1964/11/the-paranoid-style-in-american-politics/