It is politically incorrect to say so, but Eastern Europe seems to have adopted a solution. Namely don't let people into your country who pledge allegiance to a political philosophy that requires them to kill non-members.
On the local TV here the newscasters were agonizing on how you could possibly stop such murderous events ....
It is Islam - don't let it take root in your Country. The West would rather commit suicide than be accused of 'intolerance'.
And Islam has nothing to do with race. The West is committing suicide for the error of claiming Islam is a race.