Start with what you want to point out about the Holocaust or the aspects of it that you think are most thought-provoking.
Are you concerned that humans may forget this tragedy especially with the time coming when there will be no living witnesses (survivors and soldiers from WWII)?
Are you struck by the indomitable human spirit that carried on in these most inhuman conditions?
Do you want to explore the flawed concept of a race purity?
What you need is a point of view—it needs to be your own and one that you can supply supporting evidence for.