Randy - as you well know, the term Holocaust, was created and by some people, supposed to be used ONLY for the events created against the Jews in Europe by the Nazi's under Hitler's regime. Even though the Kielce Pogrom is in the time and physical "vicinity" of the world of the Nazis, it was after WWII was over - in another county - under a completely different government.
I strongly urge you NOT to include this project in or with any of the Holocaust projects.
Kevin Lawrence Hanit, Pam Karp has a Pogrom Project already in existence,
ie.http://www.geni.com/projects/Jewish-Pogroms/24693
which would make an excellent Pogrom Umbrella Project.