He doesn’t want anybody to be safe in fact he wants to destroy everything and have control over the city, similar to Heart of Darkness. In Heart of Darkness, the Europeans wanted to take control over the Africans and ruin their lives by not letting them have a chance to speak for their rights. Joker wanted to get rid of Batman because he wanted Batman to tell his true identity. If Batman does not agree to reveal his true identity Joker claims that he will kill a person every day. Killing someone innocent is not right at all. A person that didn’t even do anything wrong, who is not even involved in the situation gets murdered. If someone killed Joker for not doing anything but being innocent, that is like saying Joker would feel like he needs justice. People should put themselves in others spots before doing anything. The Europeans should’ve thought about their lives before controlling the Africans, they should have thought what if the Africans did the same thing to them how would they feel, what would they go through and how would they live