Is there any other single event in history that you can get thrown in prison for denying that it happened? If I start denying the French Revolution will French people around the world call me a bigot? If I deny the Great Potato Famine will the Irish Antidefimation League charge me with a hate crime? Will they start writing articles about how we need harsher hate speech laws?

Is there any other single event in history that you can get thrown in prison for denying that it happened?