They have been warning about muslim immigrants for decade now. When did they see these opportunity in a crystal ball.

Technically they are right. They predicted this would happen the left accused them of being gross racist who were lying but then it happened. Reality reflecting message is the definition of being right.

The police chief didn’t cover it up he followed standard procedure of almost every police force in europe to downplay and ignore immigrant crime lest the reporting give strength to the non-establishment party.

What basis for your belief that they are pretending to care. Can you not imagine that a person can be opposed to mass immigration and be upset by woman being raped.