Did Jesus not also claim to be against violence?
No.
The peace He came to bring was spiritual. While he talked about submission to authority, interpreting His entire ministry as non-violent is to miss the entirety of who He is.
And, as mentioned before, He said He is coming back with a sword to deal finally with the evil in the world.
He is one with the Father, and the Father is a Righteous, Holy and Just God who will win out over the Enemy........and not peacefully either.
Edited to add: There are obviously Christians who take a non-violent stand, based, I believe on Jesus' teaching to "turn the other cheek." They are in the minority, but it is a valid position to take personally, but IMO, doesn't factor in the entire Person of Jesus Christ as part of the Trinity, and who will lead in the final battle against the Evil One. IOW, it's wrong to slug your neighbor, but not to defeat evil on the battlefield.
Enough theology.......... back to the discussion at hand! ^-^