Certainly the British soldiers involved in liberating some of those in concentration camps were ordinary men who were shocked by everything they saw, and the incontrovertible evidence was filmed. Of course, it was not just Jews that were so inhumanely confined and killed but others too, including Confessing Christians, Gypsies, homosexuals, Jehovah Witnesses and political dissidents. Nor did the German Reich alone commit such atrocities but others including the Croatian nationalists.
Yes, genocide is not new and did not begin or end with the Third Reich, as the Armenians and Rwandans can testify. Of the latter I met one such survivor at City University, London, whose arm had been hacked off.
That there is a political agenda on the part of the followers of the Frankfurt School and their fellow travellers and, using Lenin's apt description, useful fools who push various agenda to undermine the family, faith and other institutions. But to crudely ascribe the responsibility for this to the whole of Jewry seems to me at least simply irrational Jew-hate.
As for the state of Israel and the Palestinians what nest of horrors and complex history lies here. Did the forbears of today's Palestinians grab the land from those Jews who did not go into the Diaspora, only in turn to find themselves generations on in turn brutally torn from that same land. Nor do accounts of present day Ghettoisation of Palestinians by the descendants of Europe's forced Ghettos sit very comfortably.