No, it's not 'identity politics' to call out anti-semitism. Identity politics is when a group is identified racially or ethnically or by gender as having a significance or value that supersedes the individual, either by the group itself or by others. It is used by groups to either manipulate others for their own benefit (victimology) OR by others to discriminate against a group (white supremacists). You are quite clearly doing the latter by citing the Jewishness of certain perpetrators of genocide. How is that relevant and not the fact of, say, their Soviet communist politics? No one said Jewish people are not individually human and therefore capable of evil like anyone else. Racism and anti-semitism are themselves manifestations of identity politics, which is very evident in your thinking. Besides that, your insistence that the Holocaust 'did not happen' puts you firmly on the crazy train. I do hope one day you can get off it.