Yeah, I looked through several ini files and couldn't find anything yet, which sucks, cause that's what made me quit aki 6 months or so ago. I really don't like this "friendly same-faction PMCs" shit.
I agree it's annoying, due to it being default AND unchangeable.
There should be a setting where ALL AI (PMCs and scavs) try to kill you. There are numerous combinations this could be set to.....but it's a moot point due to the current situation.