Pardon the random thoughts, I just wonder what others think about this.

As long as their thoughts and believes are too absurd to be called ”wellintentioned”, for example as a Nazi who thinks nazism is a good ideology when it clearly isnt is delusional but not antivillain as they promote evil ideas and prejudices that dont even cause any good or noble goals. While an antivillain can commit very evil acts such as murder or even terrorism but has a goal that is noble and would actually make good for other people in the end, such as V (from V for Vendetta).