If you kill them via Betty I'm pretty sure they would all come back alive to be d again, but if the program Chinese Invasion was run the program would be complete shut down and those who were killed would be forever. I think
As mentioned, Braun had been toying with these people for centuries. Evertime they died they just came back to life and it happened again. Running the Chinese invasion program disabled the failsafes, so when they were killed they actually died in the real world as well, thus putting them out of their misery.
Except Braun. He survived, meaning he had to spend eternity all alone in the simulation.
It felt to me that you didn't really make much of an effort to save anyone from there. That you just brought the whole thing down as fast as possible. I don't fully agree with the plus to Karma... but the alternative is clearly evil so I guess the "putting them out of their misery" aspect works.
Subtle commentary for assisted suicide? You tell me!
( /\ /\ is a joke. Don't be starting debates people. The Internet isn't the place for that!)