All Men Are Created Equal?

If our Declaration of Independence authors truly meant that "all men are created equal," then I cannot fathom their reasoning for supporting slavery. It seems as though there's systemic racism rooted even in the undemocratic writing of the Declaration. Those oppressed were largely black Americans, and it is those poeple who populate much of our urban centers today. BUT... How have I, a white, middleclass female, bought into, tolerated, and promoted a racist system in this nation? Just by my skin color I avoid being pulled over while driving, I have more inherent opportunity, I have a family with financial investments, and I can live in ignorance to the racism that so readily befalls my fellow Americans with darker skin color. I begin to feel guilt, guilt for even being white.