> beside that "integration" ended up in violence anyway even before wwii, when romanians started persecuting them.
WW2 and the 1930s were very difficult times (and not only for the Jews). I like to look at those times as the exception rather than the norm.
humans have been a bunch of assholes, we living in a niche of limited peace on a few locations shouldn't give us the peace of mind that everyone else understand the value of integration. note that a person or a family by itself is likely to integrate, it's significant migration that end up into more or less pronounced isolationism.
again, just have a look at all the chinatown and italian quarters. the actual border may be fuzzy, but the sense of identity is definitely there. and while wwii was an exceptional time, smaller conflict are still very present and the failure integration models are popping up every day stronger.
Even with all the carnage of WWII, I have very little doubt we'd have been back at it 10 years later if it weren't for the specter of nuclear armageddon hanging over everyone's heads.
Current Romania was formed out of regions that were occupied by different empires. The Old Romanian Kingdom was formed out of the bits formerly under Ottoman control. In 1918 the kingdom expanded to include regions formerly under Austria-Hungarian and Russian control.
When far right sentiment flared during WW2, the Jews in Basarabia (ex-Russian territory) were persecuted, even butchered. The ones in the Old Kingdom weren't.
In a weird way, they were "our Jews". They were considered different, yet still a part of our community.