So many of my friend mock others on the basis of their accent, their action, something they did in the past or some mistake or some inability. They even make fun of teachers. I hate this. I want to stop them and ask them not to make fun of these people because we must respect everyone. But whenever I ask them to stop they start mocking me for being too emotional and sensitive. So I just go with the flow to avoid being the target of mockery. What can I do?