Encapsulated in a line.
But it is naive to believe that we can arrest or deport our way out of the problem. The Danes will have to adopt a political culture that is more accepting of people who don't think and behave like us.
Appeasement 101.
Give an inch and they will demand a mile. Islam and liberal Denmark are about as compatible as oil and water.
And yes, you CAN deport and arrest your way out of the problem. The problem is too many cowardly, vote-seeking politicians refuse to act until it is too little, too late. A finger in the wind is not the way you stem a hostile invasion.