If there were no information given about the perpetrator, you can bet it was an immigrant. And they wonder why the right is rising, and why people have come out with various conspiracy theories like white genocide. By the time the native manage to rebel against their governments, it would be already to late for them as they'd already be outnumbered. Ironic that many of these countries used to have empires.
Just because of a small number of immigrants from a select few countries (such as Afghanistan and Pakistan), the entire immigrant community is getting a bad reputation. The European Union is hosting millions of immigrants from nations such as India and China. But almost all of these immigrants are law abiding people, contributing positively to the society.