Except when it does.
Cities that don't accept Jesus will suffer a fate worse than Sodom and Gomorrah.
You must put faith and Jesus before all, including family (and in doing so pit brother against brother and father against son, etc).
Violence was also fine for Jesus when he wanted people out of his dad's house.
All of which is before you get started on the books they removed, one of which called for death to all Jews and the utterly mental violence that is coming in revelations.
Cherry pick if you like, but the NT has been used to just as great a degree as a tool of conquest, conversion and subjugation as any other religious text.