This topic has always intrigued me. So let's analogise.
If someone goes out and gets shitfaced, they're pissed.
But if they're not pissed, they're said to be "drinking moderately".
Regardless, alcohol is the prime cause for whatever state of intoxication you enter. So it's interesting to see how the same people who'd blame alcohol for getting pissed (and they're not entirely wrong; cause and effect, y'know?) are unwilling to blame Islamic ideology for those who don't take their drug (in this case, organised religion) in moderation.