Divorce your conservative values from the underlying Christian culture in the US and you get -- India. Why stay here?
Because I'm an American, of course, and as entitled to all the benefits this great country has to offer as any other man. The USA is much more, so very much more than simply some supposed "underlying Christian culture." And, in fact, there are even parts of this supposed "underlying Christian culture" which are not incompatible with my preferences and philosophies. And those that are offensive... well, the law in the USA is designed to protect people like me from the imposition of those Christian things. You can feel free to do them, I can feel free to ignore them (so long as neither of us is breaking the law.)