Criminals who are muslims

Many people consider as cause for last attack failure to integrate muslim population. The last attacks from Germany,Nisa,Paris,Bruxelles and London were done by petty criminals. None of them has a clean police record.
The  main problem I see is the spread of islam within criminal community, which can
organize criminals to do political acts.
Bolshevicks recruited criminals to overthrow governments, and to repress oposition, same thing happens with Daesh.
I think the authorities should focus on reducing criminality especially in Muslim communities.

Machiavelli and Erdogan

Machiavelli in his book "The Prince", advises to set as a temporary administrator of a new acquired state a ruthless man. This ruthless man will crush any opposition. After the opposition is crushed, the prince can dispose (kill/imprison him) of the ruthless administrator and he will be hailed as a good and kind ruler who saved the people from a blood thirsty tyranny.
I think Erdogan made the same think with ISIS.
He allowed them to thrive, by not stopping the trade with stolen oil and guns.Then he tried to enter in Syria and Irak, to save oppressed people and to be hailed as a saviour.
Maybe he is doing the same thing with the coup.
Crushing the coup can be seen as a gesture that he will defend the liberty of the people.
What I expect to see is that the Erdogan party to be armed to prevent further military coup, a kind of "Iranian Revolutionary Guard" a la Turque.