The posting could be paraphrased as

"We generally say we spend too much time doing nothing because we don't have enough Hufflepuff in us. But in a Kitty Genovese situation, where there's an immediate need to act and a crowd of people watching, it's the Gryffindors who leap into motion while the Hufflepuffs do nothing. Maybe this generalizes."

Of course, it can take a Slytherin to notice these things.