When a person gets an education and goes to work abroad with big salary he is an opportunistic. Another person goes to do exchange studies in a different country. He is also an opportunistic. Third person lives in somewhat unstable country and finds out that there is a country offering an asylum for him. He takes a chance and becomes also an opportunistic.

But it happens that the third guy becomes pretty frustrated and doesn't feel too good in his new country. Strange habits, laws, language, no job and so on. He lives in a ghetto and spends his days hanging around with gangs and doing stupid things.

Whose fault? The guy who took a chance and decided to get a better life? Not really. I would say it is the fault of the country. It is totally okay to take reasonable number of refugees. Then it is totally different question whether you want and can integrate them in your society. Do not expect someone without language skills and with totally different cultural background just throw his own world view away and start following yours. Won't happen easily.

So be realistic if you want to save the world. Feel free to comment.