One thesis statement that can connect both The Crucible and The Holocaust would be the level of submission that individuals demonstrate to those in the position of power.  Salem in Miller's work and The Holocaust embody moments in the historical consciousness where the voice of dissent and defiance were absent from the respective dialogues.  Very few stand up in The Crucible to protest that which is wrong. The entire notion of what is right and what is considered wrong is ambiguous as a result of those in the position of power confusing the issue.  This same interplay is evident in the Holocaust, where the best case scenario is that individuals were confused as to "what the right thing is."  The worst is element is that individuals knew how wrong the actions of those in the position of power during the Holocaust were and stood silent.  This brings out another element in a potential thesis statement to link both realities.  Silence and indifference emboldens the aggressors. In both historical contexts, those in the position of power benefit when individuals remain silent.  Abigail and the girls benefit when individuals don't speak out against them.  The Nazis were able to do what they did without much in way of resistance when individuals fell silent.  Silence or apathy end up benefiting the individuals in the position of power greatly.  When people fell silent, even more power was given to those in the position of power.  Finally, I would suggest that both time periods reflect how political power can be easily manipulated by those in the position of power to advance their own agendas.  The traditional idea of political power as one to advance platforms of virtue and ethical conduct is repudiated in both settings.  Individuals in the position of power used their political status to ensure that their own views were advanced at the cost of the general public.