cide ▁going ▁back ▁to ▁the ▁days ▁when ▁Hitler ▁wrote ▁Me in ▁K ampf . ▁However , ▁B auer ▁takes ▁issue ▁with ▁Function al ist ▁histor ians , ▁such ▁as ▁Hans ▁M om ms en , ▁who ▁argue ▁that ▁the ▁lead ▁in ▁the ▁Hol oca ust ▁was ▁taken ▁entirely ▁by ▁lower ▁level ▁officials ▁with ▁little ▁invol vement ▁by ▁the ▁leadership ▁in ▁Berlin . ▁ ▁B auer ▁bel ieves ▁that ▁Hitler ▁was ▁the ▁key ▁figure ▁who ▁caused ▁the ▁Hol oca ust , ▁and ▁that ▁at ▁some ▁point ▁in ▁the ▁later ▁half ▁of ▁ 1 9 4 1 , ▁he ▁gave ▁a ▁series ▁of ▁orders ▁which ▁called ▁for ▁the ▁gen o cide ▁of ▁the ▁entire ▁Jewish ▁population . ▁B auer ▁has ▁pointed ▁to ▁the ▁discovery ▁of ▁an ▁entry ▁in ▁Him ml er ' s ▁not ebook ▁dated ▁December ▁ 1 8 , ▁ 1 9 4 1 ▁where ▁Him ml er ▁wrote ▁down ▁the ▁question ▁" What ▁to ▁do ▁with ▁the ▁Jews ▁of ▁Russia ?" ▁According ▁to ▁the ▁same ▁not ebook , ▁Hitler ' s ▁response ▁to ▁the ▁question ▁was ▁" Ex termin ate ▁them ▁as ▁part is ans ." ▁In ▁B auer ' s ▁view , ▁this ▁is ▁as ▁close ▁as ▁histor ians ▁will ▁ever ▁get ▁to ▁a ▁definit ive ▁order ▁from ▁Hitler ▁ordering ▁the ▁Hol oca ust . ▁B auer ▁bel ieves ▁that , ▁at ▁about ▁the ▁same ▁time , ▁Hitler ▁gave ▁further ▁ver bal ▁orders ▁for ▁the ▁Hol oca ust , ▁but ▁unfortunately ▁for ▁histor ians , ▁nobody ▁bother ed ▁to ▁write ▁them