you guessed it.
having people of different nationalities is pretty much inevitable in certain places, especially places with exceptionally good collages, jobs and such. but people who come to study or work are not exactly to be treated exactly the same way as "native" people. thats not to say their treatment would be worse, but different.
people of different races coexisting in the same place isn't the issue itself, its the race mixing in relationships, especially for those that plan to have kids, that's the problem.
immigration is a problem for more reasons than just race mixing, even though that plays a role too. to give an example familiar to me, many filipino families here are getting apartments funded by the government, while people who grew up in the same city cannot afford an apartment without at least one roommate, assuming you both have above average paying jobs.
it creates chaos, to put it simply.
as for the last part, "no jews" is pretty much a must for every country in the world that cares even slightly about it's people
