the people that you call "progressives" in the united states are generally called "conservatives" in most other places in the world.
this is a good article explaining why conservatives are going to be inclined towards pacifism. if you self-identify as a progressive, and this makes sense to you, then you should put things together and realize that your history and values are on the right rather than the left.
leftists, on the other hand, have historically seen violence as an unavoidable necessity to advance social change.
they missed the argument from property rights, which is more
fundamental in my view: if you support property rights, you're far more
likely to oppose violence as a rule than you are if you don't. it is
conservatives that are big into property rights; the left doesn't
support property rights at all, but rather supports dismantling them with violence and redistributing the wealth by force.
https://www.theamericanconservative.com/articles/why-conservatives-hate-war/