Answer: the false answer is: "They are all bad people".
Explanation: In literature, an antagonist can be anything that threats the protagonist, providing an obstacle, a challenge, confusion, etc. It may be represented by a human force, a trait that belongs to the protagonist, a character that is unlikeable for the audience, nature forces such as disasters, society rules, among others. Having this in mind, it's easy to see that not necessarily an antagonist is a villain or a bad character.