I shot someone and now his faction hates me (spoilers)

[Doctor Atomic]

So I got tired of Tobson and tubed Edgewater by cutting off their power, then I shot him in the back, then I had to kill everyone else in town.  Maybe this was not the best plan.  Now I am kill on sight with Spacers Choice.

Is there any way to make amends and get back in their good graces?

[Gizmo]

Gosh I hope not.

[Josue]

something similar happens to me with another faction, but I need to do the passes because it is the main mission and I can not buy the pass to the old woman, does anyone know how to solve it?