Re: Why is he acting like this? 
Because goray lack integrity when it comes to relationships. They’re highly unbalanced and tend to change their partners as if changing ties. I know i’m generalizing but it happens. So i wouldn’t get involved with a gori considering she probably had multiple sexual partners in the past. I wouldn’t be able to trust her as much as i would a Pakistani Muslim girl or an Indian girl for example.
Most of them are atheists (Leaving apart the crazy christian fundamental girls) they have no concept of religious morality.