The reality is, we're not family. I don't have to be sensitive to my family. If I don't like them, I can say and do as I please. If they don't like me, the same. I don't have to care about their feelings, I don't have to accept their life choices. I don't have to see them every day. I don't have to accomplish tasks with them. I can quarrel with them, and eventually they may choose to forgive me because of kinship, or not. Point being, there are precisely zero commonalities between family and work peers. And there shouldn't be.
The contrarian jerk in me really wanted to yell an epithet during training and say something along the lines of "What, if we're a family, I'm the racist uncle that your dad keeps inviting to dinner despite his offensive tirades and uncomfortable leering at your sister. Deal with it."