1. He hasn't been married very long at all. He's lived in the US for 10 years, never assimilated, never liked it here, never felt like he belonged, never "understood" Americans, had no American friends, wasn't in college, didn't own a home - what kept him here in all the years he hated this country and was unmarried and childless?
2. His wife changed her entire religion for him, the way she dressed and acted. All reports say he was controlling and dismissive of women. He wanted her to convert - she converted. He wanted her to cover her body and hair - she did. If he'd have wanted her to move to his home country, IMO she would have moved. In any case, the articles say that he DID want to move her and his baby there, but his father "made him stay" in America. His wife's preferences don't appear to have weighed at all in his decisions.