Of course, those same people had wiped an entire planet off the map to make "a point", and generally ruled the galaxy with a iron fist. The force took exception to such a disruptive group of people being wiped out evidently.
Circumstances is everything. By merely being on that station they had become a thrall of the darkside and thus disposable to the force in the simpliest possible simplification; they had to die to stop the station from firing again.
Well they view conflict as literally being conflicted with one's self ie you kill someone "oh my god I just killed someone am I an evil person? was it ok?"