Projection
Projection is the process of displacing one’s feelings onto a different person, animal, or object. The term is most commonly used to describe defensive projection—attributing one’s own unacceptable urges to another. For example, if someone continuously bullies and ridicules a peer about his insecurities, the bully might be projecting his own struggle with self-esteem onto the other person.
Thread Troll
a person who posts inflammatory, insincere, digressive,[1] extraneous, or off-topic messages in an online community (such as social media (Twitter, Facebook, Instagram, etc.), a newsgroup, forum, chat room, or blog), with the intent of provoking readers into displaying emotional responses,[2] or manipulating others' perception. This is typically for the troll's amusement, or to achieve a specific result such as disrupting a rival's online activities or manipulating a political process