The first question I have...

Isn't why was this man left alone in the park to die of heat stroke, it's where was his family to help him that day?

If he truly was ridiculed by fire and ambulance personnel as they attempted to save his life, then yes, I can understand some anguish over that part of his death. I'm sorry to say though, that to expect passersby to step in and do something for a homeless person without specifically knowing he was in distress or how long he was sitting there is expecting too much for the average tourist or park visitor who are just there for a good time.

I doubt that a caucasian, black or asian homeless person would necessarily have fared any better with parkgoers that day.