The point is, nearly 100 percent of the time, people that set off the bombs called terrorist. Like you say, this is pretty obvious. But if we know who the enemy is, why not call identify them by name? If they are all Muslims, or directly associated with the Muslim religion, why not call them Muslim terrorist?
"why not call them Muslim terrorist?"
I can''t speak for others but I do. Actually I call them Islamic terrorists.
" directly associated with the Muslim religion"
In there minds yes. Something I read a while ago pops up in my (so called :-)) mind. I can't remember where (Benard Lewis(?) That what we are seeing is a civil war inside Islam. The radicals (starting with the Muslim Brotherhood) against the secularists (pan-Arabists) and we (the west, because of our support in times past for these governments, and our support for Israel) and the average Muslim are caught in the crossfire.
I don't know how much I buy this but it is a way of looking at it.