if i was single, i wouldn't marry a non Christian. imagine if everyone was a Christian like Jesus taught. everyone would behave much better than they are now. all kinds of "what ifs" can be mentioned. no the world would not be perfect but much much better off. think of Christian churches. they are a small community. they trust each other, believe in each other 7 support each other. a large community can exist that way also.you probably would if you lost your senses and married or partnered with someone who wasnt a christian to further political alliances lol
Because all the other world leaders are not christians so it would be you against the entire world
also, be very hard to police everyone unless your dicatorship was very very small. Like maybe only a couple of people. Children would be so intimidated but if what you said was law you would just abort or terminate anyone who wasnt a christian right?