I believe there was some degree of collaboration between zionists and nazis If memory serves, it's theodore hertzl (not 100% sure) who stated basically that, a newly created state for jews (in israel), wouldn't have a chance of success if the old and sick, the weak, were among the first generation of settlers, that they would become for, obvious reasons, a burden for the strong/young You also have the lehi group https://en.wikipedia.org/wiki/Lehi_(militant_group) , hell bent on creating a totalitarian state in israel, willing to jump both on the nazi and soviet, bolshevik ideological bandwagon, to fight against the british (who were deemed as the biggest obstacle to their project, bigger than the nazis) So, given that the (at least apparent), ideological "incompatibilities" aren't a problem for radicals, since the end justifies the means, obviously, I believe, but that's only my opinion, that the "genetic sorting" nazis were doing, between the"weak and the strong", in the camps, was made on behalf of zionists authorities https://en.wikipedia.org/wiki/Haavara_Agreement At least for a period of time. Then things went south and the transfer agreement got de facto canceled