This is a puzzling question. By definition a victim is 'involved' in a passive sense; they are picked on.
'Involved' as victims or perpetrators?
Holocaust victims.
because they were looking after their own people
The victims are dead.
The people involved as victims of the holocaust did not have candy bars. They considered even a potato as a luxury.
YES, The Holocaust victims did consist polish people.
the victims
they were the victims
They were victims in the way that they were persecuted and killed.
Most Holocaust victims were all ages, from newborns and unborns to 100 year olds.
Gas.
presumably you mean by the Catholics against the Jews; it was called the Holocaust. Though what happened in Yugoslavia was independent of the Holocaust, the victims are counted in with the victims of the Holocaust.