It hardly ever the other way around. Its no secret that Islamists are responsible for most of the terror attacks in Germany and Europe, and here you are justifying terrorists. There is a reason why China does what it does ;-)
US CSIS data says attacks by non-Islamists account for 85% of total attacks, while attacks by Islamists is just 15%.
In Europe, Europol TE-SAT data says it's 59% by non-Islamists vs. 41% by Islamists.
Also, I'm not justifying this attack. I'm pointing out the double-standards.
"What is per capita?"