I guess we are now learning everyone has their lone wolves who are easily corrupted in the name of Allah or God.
Pick your religion and your soup du jour for the day.
Here in the US we burn black churches, kill black parishioners, firebomb abortion clinics, kill gay people and shoot abortion doctors in the name of God.
Of course we don't call those people terrorists. We call them hate crimes.
It's all in the definition.
“Never argue with stupid people, they will drag you down to their level and then beat you with experience.”