Answer: To Create Attention and Tension or Try To Seem Tough Usually When Partaking In Ego Boosting And Or Bad Attitudes Gangsters Usually Do So For Initiation And "Group Development" Which Leads To A Worldwide Emotions In Peoples Lives.
Answer: I might not have the best explanation, but here goes, People who bully other people in general, are usually narcissist, because they want to feel superior to others. If these people you are talking about, are alone, they are bullies to people in groups because they don't have the friendship these people might have, so they get jealous, and feel the need to take it out on these people in groups.
