In all these examples, there was sufficiently long period of occupation. That was also the case in Germany, but the Jewish inmates from Concentration Camps in general did not stay in Germany for much longer. Many emigrated to would-be Israel or the USA.

So they did not get involved with the occupying forces for long enough to enter a significant amount of relationships (of any kind).

Edit: Occupation does of course not fit for WWI France or WWII Britain, but the GIs were stationed there for a sufficient amount of time.