The meaning is that millions of Jews killed by Christians is fair retribution for Jews either killing their God, or for the 27 early Christians killed by Jewish sects 1900 or so years ago.
Justifying the Holocaust and Inquisition and everything else is exactly why I have trouble with what some Christians believe.
Explain something:
If Jesus is Lord, then he knew he was going to be killed and his murder serves a function in Christian theology. How can it be worth a Holocaust if it was all pre-ordained anyway?