You know, I'm not certain, but I'm reasonably sure it's Catholic teaching that one doesn't have to be Catholic to sin. In fact, one doesn't even need to be Christian to sin.
Seems remarkably easy to forget that at times. In fact, I'm pretty sure that non-Christians can be rather adept at the practice. Including muslims.
Somehow it seems like the only ones engaging in any sins worth talking about are Catholics themselves, as far as the Vatican is concerned. Everyone else? Pshaw. Hardly! Atheists? They try to follow their consciences! Islam? It's a religion of peace!
Christians? Now THEY have some apologizing to do. Did you know they said mean things about LGBT people? To think they had the nerve to suggest that many have anal sex. Jesus weeps, etc.