Sure, it's possible. That's why I responded. It's somewhat complex, too. Depending on where these people are living, it may be less likely that they could say anything at all. As I showed you, there are many here in the States who are very vocal about their dislike for what is being done. They might not be as inclined back in parts of the Middle East for fear of being eliminated or hurt, or who knows what. That would reflect the scenario in Nuk's analogy, like Little Italy in NY City. But, just because they cannot speak out doesn't make them complicit with the acts of terror.
I'm not defending or excusing the acts of terror at all. I never have. Quite the opposite. I just believe it's wrong to blame the religion or blame all Muslims, in general. I see that being done or implied far too often.
If you're deranged enough, you can be inspired to murder people from reading Winnie The Pooh. These deranged individuals, and their sub-groups are the sole culprits, not the entire Muslim population or the religion itself. I think it's important to keep them separate is all.