A large part of the old Testament is about the Jewish people and how they are God's chosen people. In the new testament Jesus made it (to the Christian perspective) so everyone gets to be in that chosen club. The crucifix is a roman thing even though the angy mob was Jewish, Jesus was also Jewish, many followers of Jesus were Jews etc. Also some prophecies in the book of revelations (last book in the bible) but I don't remember much off hand.

Add in the horrors of the Holocaust and its hard for people with a simplistic good or bad/binary worldview to even understand other perspectives.