You’ve got plenty of replies already, but I don’t see one saying this. You do not have a requirement to be nice to the cops. You have to identify yourself in most states, and you have to provide license and registration. You do no have to (nor should you) answer questions or be polite. The reason they ask questions is to get you to contradict other statements or to otherwise incriminate yourself. Their job is not to protect people. It’s to arrest people. It’s shitty, but that’s the world we’re in. We should not defend the state agents who are given this much power over us. It is wrong and indefensible.