Well, I'm just gonna give my own input as GM, because this will probably spiral out of control.
Every other character in that area is currently planning to work for/aid the crew inside the military base. Your character, who has at this point not established himself (clearly) to be part of their group, up and decides to kill some of the limited personnel that they have guarding the place.
This action will literally turn the ENTIRE group against him, and I'm fairly certain he won't be able to talk his way out of it. You've more or less done something REALLY unnecessary and... Well, you're now heavily outnumbered by people who could probably take him on 1v1 anyhow.
I'm not going to perform any divine intervention, but know this: any actions that come as a byproduct are what you brought onto yourself. Though I won't bring the hammer down definitively, I will mention this: RE5 Wesker shares a few abilities with Mithias (namely, superhuman strength and speed). There WILL be a kill order put out, because that's what is in character for our NPC crew given their past experiences.
So... Best of luck trying to dodge death, because now everyone's out for his blood.
Ironic, isn't it?