The question is, are you looking for contributing individuals? Or, are you looking for diversity? What is your primary goal?
There are plenty of individuals who want to legally come here to work hard and continue building the greatest single society on the earth. But, if those individuals have the wrong skin color, would you turn them away in favor of people who have the right (in your mind) skin color?...even if the "right colored people" (again, in your mind) are from societies that do not share US values? Are you looking for groups of people to build a diverse society?...judging them by race? Or, are you looking for hard working individuals?...judging them on there character rather than their skin?
If you even consider skin color in your answer, we will all know where you stand...against MLK, and for equality of status (equity).
((I may or may not be able to reply for a day or so. My schedule is uncertain for the next few days.))