The part about no support isn't really true, at least in the Netherlands. There has been an endless stream of government programs, and billions upon billions of euros invested, which unfortunately had only a small effect. So I have little hope that the current immigration will go significantly better. I don't know if there's a magic trick, but if there is we certainly haven't yet figured out how to perform it. Even in cases that seem very successful the results aren't as good as you'd hope. The mayor of the second biggest city in the Netherlands is Moroccan, and he has said that he will not allow his daughter to marry a native dutch man. The theory that it's all about not enough support doesn't explain the fact that there are lots of successful groups of immigrants, like the Chinese. They have high employment rates and low crime rates. Therefore I don't really like the talk about the failure of multiculturalism.