Research Papers / ANTI-SEMITISM & CHRISTIANITY PAPER- what to focus on? [2]

So i have a 10-12pg research paper
CLASS = "christian and jewish responses to the holocaust"
TOPIC = antisemitism and Christianity
instructions = no limitation as to where i can take it

I am a very good writer and know a decent amount about theology, however i have no idea how to tackle this topic. I am allowed to focus on a particular theme within the topic but i dont know what would be best to hone in on as it spans for 2000years.

possibly: early Christianity's role in antisemitism or the influence of Christian philosophy in antisemitism

PLEASE HELP!

I need to narrow down this broaden topic to a specific theme!!

thanks !!!