In the extremely uneducated opinion of someone who just learned about it and hasn’t done much deeper digging, I would assume the civilians were all collaborators of varying scales, given they fled the country alongside the military Nazis. I don’t think it’s possible to verify that everyone deserved it, but they were the ones leaving with the Nazi army. As for why they were all killed, again my uneducated assumption is that there simply was not the prison space nor logistic capacity to hold them all.
In the extremely uneducated opinion of someone who just learned about it and hasn’t done much deeper digging, I would assume the civilians were all collaborators of varying scales, given they fled the country alongside the military Nazis. I don’t think it’s possible to verify that everyone deserved it, but they were the ones leaving with the Nazi army. As for why they were all killed, again my uneducated assumption is that there simply was not the prison space nor logistic capacity to hold them all.