Recent events exemplify the dangers of using one's religious beliefs as justification for personal prejudice.
When a someone designates themselves as the voice of God, such hubris eclipses any illumination that his faith may be said to provide. At best, one can hope to perceive the will of the Lord for one's own life; the presumption that our limited knowledge empowers us with the ability to prognosticate the action of Deity speaks of an ignorance and arrogance unmitigated by charity.
God is commonly used as an authority to sanctify our most odious bigotry; first comes the fear and hatred, then the rationalization to justify it. We stride better to seek our salvation when unencumbered by the weight of ignorance; the souls we save may be our own.