There has been a growing trend lately, and perhaps it was always this way, where people are incredibly distant and passive from each other in bad situations. There is difference between the bystander effect and complete desensitization. The bystander effect has bystanders at least somewhat caring about the situation, though not enough to act.
The bystander effect is less likely to happen when you have a group of able bodied men that witnesses an incident. For them, it only takes one of them to act for the others to join in. This brings some hope to humanity, as sometimes terrible things result when nobody steps in.