The Holocaust?

So, according to what a lot of "Christians" say, God is just. I agree with that, yet they say only Christians go to Heaven. What about the Holocaust? The murdering of millions of Jews occurred unfortunately. How many of those Jews were Christian? Not one. So the endless suffering that they experienced before death (starvation, dehydration, being beat, etc) would obviously anger God. According to what a lot of Christians say, Jews don't go to Heaven. Do you expect ANYONE to believe that God would endlessly torment these people after the terrible physical death they already endured? What a crock. Makes no sense. How does physical fire even burn spiritual matter or cause it pain? Since God knows all and would know before we were even born whether or not we would die in the "right" religion, why were we still created? Just so God could punish us for eternity? Eternal hellfire and a God of unconditional love contradict each other. So does the physical pain a spirit is supposed to experience