These people are full of it. Robbery is how these parasites finance themselves.
Robbery is how they finance themselves, but the self-esteem part is VERY true. The lefties don't like this part, but good research has shown that the thing leading to this violence is not LOW self-esteem, but when someone's self-esteem is threatened. In other words, if we prop it up artificially, it is more likely to be threatened, leading violent reactions to try to preserve the false self-image.