The morals of intervention become even more complex when you toss religion into the mix, since religion claims to be the source of morality. So when two religions and two different moral viewpoints become involved, BOTH claim divine support for their position. Do you step aside and let those OTHER heathens destroy themselves?
I hesitate to become specific because this could easily become a "bashing" session. I won't do that because it IS a hornet's nest that I would "whack" if I started getting specific.