If they aren't, then they aren't Moe-Ham-Heads.
Also true... they are not "true Muslims"... many Muslims are Muslims in name only. Islam claims them, not the other way around. I had "Muslim" friends overseas who did not practice the cult of death... and were decent people - but not "true believers."
They have a hard time (officially) leaving Muhammeds (Pork Be Upon Him) cult of death . Ibn Warraqs book "Leaving Islam" is a collection of stories that offers a great deal of insight on this.