Too many immigrants only care about their home country, and don't care to assimilate at all. If you go to Japan to work for example, there's the expectation that you will assimilate, learn the language (and of course) obey their laws, plus assimilate their culture to some degree. Hispanics for the most part don't care, same with Africans. Muslims will outwardly care a little bit, but inside and among their own, they will never stop their conquest of the world.
Too many immigrants only care about their home country, and don't care to assimilate at all. If you go to Japan to work for example, there's the expectation that you will assimilate, learn the language (and of course) obey their laws, plus assimilate their culture to some degree. Hispanics for the most part don't care, same with Africans. Muslims will outwardly care a little bit, but inside and among their own, they will never stop their conquest of the world.