In September, more than 120 Islamic scholars and clerics wrote a letter to ISIS in both English and Arabic denouncing ISIS and its invoking of Islam to justify its horrific actions. They even explained in great detail how ISIS is violating the Quran and teachings of the Prophet Muhammad, concluding that ISIS is truly unIslamic.

Yet these words don’t move many on the right in America, who continue to argue in essence: If a Muslim yells “Allahu Akbar” after committing any action, that absolutely means that their conduct is based on the faith. That is beyond simplistic—it’s idiotic.

And nearly as ludicrous is the claim by people like Republican Sen. Kelly Ayotte, who stated on Fox News on Sunday that we need to call it “radical Islam” because we “have to define our enemy.”

Look, there’s no such thing as “radical Islam.” There is only one Islam. But there are radical Muslims.  And there are Muslims who engage in terrorist acts. They are called terrorists. That is the proper way to describe them.