Your professor was wrong in so many ways. Not just factually, but how she behaved toward you, and all PoC. If we wh ite folks ever experienced in our own families, what slavery did to Slave families, we would say our families had been broken. That we still would have loved, longed, and strived to be reunited, that we would still have wished to protect our loved ones as FAMILY are supposed to be able to do, that our love had not been crushed, none of that would have meant our families were strong and intact, that the very notion of family was impossible for Slaves under slavery.
I honor your strength and bravery standing up to such arrogance.