Bleeding-heart liberals live in a land of make-believe where everything is black and white, a bit like TV back in the 50s and 60s where the good guy, dressed in white, always prevailed against the bad guy, dressed in black.
They, the liberals, are always the good guy, on the side of justice and everything noble and blameless, no matter how foolish their ideas and how horrendous the consequences of those ludicrous ideas may be.
These liberals are particularly susceptible to anyone’s sob story. Give them a sob story and you are half way home to having a diehard ally on you side, no matter how ridiculous the sob story may be. And that’s where the simple-minded liberal really goes off the rails because he or she ends up aligning themselves with any number of never-do-well scoundrels out to hoodwink them with a sad — but very imaginative — tale of woe.