To avoid getting political, I'm pointing out that you can have "radical _______ terrorism". It's not religion specific because the people that act that way do not represent their religion, country or race despite their claims. They're just nut jobs creating their own reasoning.
That's why it doesn't bother me where the characters are from, what beliefs they claim or what they look like.
Except the blank can only truthfully be filled by one "religion" that accounts for about 99% of the "religion" based terrorism in the real world.