The Germans owned the holocaust because they lost WW2 and afterwards became a vassal state of the Allies and later just the US. History is written by the victors.
The Germans "owned" the holocaust because the Nazis (German) started, conducted, and maintained the systematic collection, extermination, and destruction of certain classes of the population under their control.
The Germans "owned" the holocaust because the Nazis (German) started, conducted, and maintained the systematic collection, extermination, and destruction of certain classes of the population under their control.
Who else should have "owned" it?