Were The Holocaust happening today, Western media would be awash with quotes from Hitler, the Third Reich, and Nazi sympathisers justifying it.
Israel has not only turned Gaza into a literal wasteland, it has also turned the West into a moral wasteland.
(And only the latter is self-inflicted.)
More likely in my view there would have been a combination of AI and other fake material showing conditions in concentration camps to be comfortable and humane (there was a bit of this with #theresienstadt at the time in glossy magazine articles), actual denial and threats to governments and media in third countries for daring to mention it ( #sweden experienced a lot of this in 1942 ). A classic piece of disinformation currently is a clip purporting to show a food market in #gaza .