4 ideas
Her help unsettles his standing at home without giving him a secure place in her world, and the intervention collapses as the pull of his neighbourhood and its violence reclaims him. The episode is a concrete test case for any claim that one committed individual can lift one person across a hardened class line.
The same events are told by the helper and by the helped, and each voice reads them differently. What the benefactor experiences as generosity, the recipient experiences as surveillance, condescension, debt, or a set of rules he never agreed to. Reading an aid relationship from both sides shows that good intentions do not produce a shared understanding. Each party's misreading of the other drives the breakdown more than any single bad act.
In Jamaican usage, 'dog-heart' means a heart that can do cruel things without feeling. In a violent, scarce environment this callousness is an adaptation, because a child who stays soft is exposed to harm. From the outside, what looks like a character flaw is often a rational defence, and asking someone to drop it asks them to give up protection their world still requires.
Charity that pulls one person out of their community, while leaving the structures around them intact, leaves them caught between two worlds and accepted by neither. The rescued person pays social costs at home for their new ties and faces conditional acceptance above. When the benefactor's help wavers, the old world is the only one still holding them.