On second look, I think you're right, debk. There'd be no legal issue involved, though, if she had said "Islamic community" (that'd be plain 1st-amendment protected free speech and not defamatory, as it's an opinion, not a statement of unprovable fact; I think it's more about the retaliation and also that she sees some PR value in making the distinction for the sake of "appearing reasonable." Even though it's a false distinction.
I thought about the 1st Amendment too, but I still think with her, as the "chief" of her organization, she was probably warned about being specific.
It's one thing for you and I, or everyone here to talk about Islamic supremacists and the Islamic community either as one and the same, or comparable, but going out into the public and addressing an audience...as she was on O'Reilly...she has to avoid sounding "racist"(I'm beginning to really hate that word!!) and characterizing all Muslims as "evil terrorists".
And you are right that it's a "false distinction"....and anyone watching it could say the same. However, false or not, she still was extremely clear to point out the distinction, and can not be accused otherwise.
Will that make a difference to the "supremacists" as to harming her or her family? Probably not.
I do think that with her going out on these various tv shows, it may make her and her family safer. If anything should happen, God forbid, to her or her family....guess which direction the police would be looking first? That guy who's in charge of the mosque/community center, would be my first guess.