Perhaps in the US due to pre-selection, but in Europe the 2nd generation of those MENA migrants frequently becomes an even bigger burden to the host countries due to the former turning to criminal activities or radicalization.
No one knows what would have happened had the blackout continued for more than one night. On the first night, even the criminals and predators were unprepared, police and emergency services would still respond, people had food and water. Already at the second day those things might start to change when phones run out of power and unrefrigerated food begins to go bad and people start to run low on water or cash.
Could you please explain what you mean or give a simple example?