Since Vatican II the Catholic church has tried, in many ways, to make amends for their mistreatment of the Jews. I accept their efforts, and it truly disturbs me when some in the Jewish community don't even try to see that they are trying to make amends.
I'm old enough to have experienced brutality as a child, being called a "christ killer" and beaten up so badly for it once that my nose was broken. I decided at that point that I would never be as ignorant of their religion as they evidently were of mine, and so comparative religion has been a hobby of mine most of my life.
I try to focus on the things Jews and Christians have in common, because I find that by educating BOTH Jews and Christians about the common bonds and similarities our religions have, it often leads both Jews and Christians to see that with so much in common, we should not be hating each other.
One other thing to keep in mind, as I tried explaining to a friend of mine today: When Christians reach out and try to do the right thing, we should accept it and be encouraging. Remember that during the Nazi genocide, there were religious Christians who risked their very lives and the lives of their families to hide and rescue Jews. This is why the state of Israel has groves of trees planted in memory of Righteous Gentiles.
By refusing their goodwill and their apologies, it is quite possible that the next time around, they will remember that and not rescue any Jews. By exhibiting hatred toward them when they mean well, we may very well be bringing about the deaths of Jews in the future who could have been saved.
Think about it: why would YOU want to help people who show you nothing but hostility, even when you are trying to do the right thing?