Why do millions want, and do (risk their lives) to come to the USA if we are hated so much?

There is a very good chance that 99% of black Africans would rather be here in the USA than the swill they cause and live in there, and many churches here in the USA can't wait to get them here. If as many say "It is just skin color that separates the races", why aren't Whites flocking to Africa for a better life? Any Ideas on this?