The reason why Obama did not use the term "radical Islamic terrorism" is because ISIS and other terrorist groups are not Islamic. They merely use the religion as an excuse to murder innocent people. When you call them "Islamic terrorists" you are falling for their trick and are helping them to recruit new members by making terrorism a religious issue.

Then the only thing ISIS recruiters have to do is approach Muslims and say, "Look at how America hates our faith and wants to kill all of us. It's obvious we must fight to protect our faith and everyone we care about!"