Why is it so heinous to think that Christ could travel to the Americas and preach to the Native Americans? He is God after all. I agree with South Park at the end of their Mormon episode. If something helps people lead better lives and makes them happy without hurting you, why is it such a problem?
The part where they did "Dumb. Dumb. Dumb. Dumb.?"
It is heinous because it is not true and they claim it is Holy Scripture.
It does not matter if something helps people "lead better lives" if it takes them from true salvation in Christ while claiming to lead them there.
However, I agree that everyone has the choice to go to Hell.