This cannot be true. You are ignoring the indivudal host country´s policies. In any case, we in Sweden have an intensive modern-day history of taking in refugees and yet it is only now - with the masses of Arabs - that we are suffering the malady you describe...
...Don´t let your Crusader-coerced Christianity fool you
I am not interested in a relgious doctrine or serving the whims of the globes needy..
yes, TODAY, you have somalis, misc north africans, middle easterners running amok and burning neighborhoods in your cities, THAT YOUR OWN ETHNIC SWEDES cannot safely enter anymore... while you wail like cowards against racism and accomodate them..
this is the RESULT or your 'intensive history', and its ill-concieved give-away of a formerly top-level functioning state to masses of those useless to even their own native populations in their homelands, WILL seek its recompense of you, or more likely your children, in short order.