This is not good.
But it's not unexpected, either. When the Dutch government's response to the murder by Islamofascists of a citizen reasonably and justly critical of Islam is to pretend there's no latent clash of ideologies, to decry the statement "Thou shalt not kill"
as racist (!), it's an unhappy probability that retaliation will occur. It's despicable, no less so than the same vicious vandalism going the other direction
The problem, however, is not going to go away by ignoring it. Europe has a large unassimilated immigrant Muslim population, many of whom genuinely do not share a number of western values. Those landed immigrants who have immersed themselves in their adopted culture, who loudly do enjoy and appreciate freedom of speech and freedom from opression and blind submission (in this case in Canada), receive death threats.
The only way out is to encourage the voices of dissent, and stop coddling the terror-enablers under the aegis of multiculturalism. It does no favours to the unreformed medievalists longing for the return of the Caliphate, nor does it do respect to their victims. Neither will studious neutrality solve the problem, as it's taken for tacit approval - and encourages hateful reprobates, upset with a lack of action, to lash out wildly at anyone who just plain looks different, as the above shows. Murdering someone for questioning the supposed superiority of a religion is wrong,
no matter what the faith of questioner or killer; why is it too much to expect any government to get behind such a common-sense stance?