Lets fuckin dismember someone over and over, shoot them in the head and stab them over and over after luring them into an apartment, and then enjoy eating a pizza during the ordeal. Do it 50 times or more and you are in fact a serial killer! Just as bad as Jeffrey Dahmer.
You can't dismember someone "Over and over"unless you are reassembling them. They did not stab guys over and over for fun and laughs. The killed people fast, there were some bodies cut up not for joy, but for hiding evidence during disposal. The pizza remark is dumb, there was a Chicago murder where the same claim was made: :The sit there eating pizza (Or spaghetti) while torturing/killing/chopping up bodies. I don't believe it.
