I’m not trying to be glib, I’m just really busy right now, but I would challenge you to find writings about the holocaust in Ukraine that doesn’t discuss the participation of the kulaks. Read yitzkor books where people recorded their personal experiences. Read the entire pre holocaust history of kulaks ruling the Ukranian countryside through antisemitic violence. Consider the entire purpose of modern antisemitism, including the holocaust, which was to preserve petty bourgeois power by misdirecting working class rage.