Although we are given the promise that a prophet of God will never lead us astray, that doesn't mean that a prophet will never say or do anything that we don't like or don't understand. Taking those things back to God is critically important. And trusting that "we believe that [God] will YET reveal many great and important things" is vital!
Sources for understanding 
Be One Celebration
https://www.youtube.com/watch?v=52-y98r2ZYs
Brother Corbitt
https://history.churchofjesuschrist.org/article/personal-essay-on-race-and-the-priesthood?lang=eng