I am not sure - but terrorists weren't using magic if i recall right. only the anti-magic ring. Plus it was hinted that they are actually working for some other country to steal top secret research data ep or two ago.
I am disappointed with adaptation - next arc should be better. I expected eyecandy fights... yet fights are as short as possible and they prolong exposition to the worst parts of the series. All my hopes that it will deviate from source have been shattered.