It's worth going through the exercise of finding the most particular category of people that the acts come from. So in the case of the recent waves of terrorist

It's worth going through the exercise of finding the most particular category of people that the acts come from. So in the case of the recent waves of terrorist attacks in Europe, it seems more appropriate to call them fundamentalist sunni or salafi terrorism, rather than a blanket islam/muslim which disregards important differences within the (very large) community of muslim believers. In the 190x it was also a quite singular group of anarchists, not all atheists or socialists.