No, that's again a refusal to understand why they are doing it. Happy religious people (say, devout Hindus during Diwali) don't go around killing others. There is a lot of "otherness" and segregation in Europe, poverty and war in the countries of origin, and many other factors that radicalise people. Saying that they're doing it because of a book (that they probably didn't even read) is just your own way to turn them into a justifiable target.