What are the patterns and motivations of the modern leftist liberal? In the spirit of know-your-enemy, what do we know?

It seems to me one common characteristic is the liberal's feeling of being ostracized by society because of some sexual or psychological trait, such as being the 37th gender, or an inability to hold a job. In some ways the leftist is like a 5 year old, but the tantrum results in large fires and looting. Is it bad parenting? Are they all enthusiastic for the endless promises of free health care, free housing, free drug money, free education, a free car and no need to work a job? Are they just rabid pack animals who get their kicks destroying individuals by working together as a mob? Is the mob mentality a result of feeling powerless? Are they all sociopaths and psychopaths?

Let's try to understand this bunch, and get better at neutralizing their influence.