I probably don't know enough people to have heard Trump's kind of repulsive boorish talk all that much. Trump's implication that most men (all "real" men?) act this way is among the worst insults I can imagine. Having taught middle school, when I would hear a nasty or derogatory comment about Mexicans or girls or gay people or Asians or even some other student, we'd stop the class and talk. And talk, and talk. About civil rights. About each other. About how we are all different and we need to protect how we treat each other. It has to be very clear that this is not acceptable in our school and society. One point is that getting this straight is more important than covering the class material. Similarly, among adults, when this kind of talk happens, you have to say that's not acceptable, that's an ugly way to think and talk, and then leave the group. This is standing up for what is right.