The hell is wrong with people?!

[TheRookie8]

I believe you answered your own question in your title.

Keeping it simple? A general lack of decency led to anger and conflict, which then progressed to violence because people felt the need to validate themselves. That's all that happened here.

True validation and peace comes from helping others, and any sort of pride or fulfillment garnered from the suffering or cheapening of others is empty and cruel. You head in that direction, you're asking for a bloody outcome.

 

[TheRookie8]

Apparently someone said part of the video was cut. The cut video apparently showed the black man attempting to leave and the two white guys preventing him from doing so, causing him to start his outburst. But with the internet you can never be sure.

That seems hardly plausible.

Why would the two white guys preventing the black guy from leaving and then, after he insults them, just turn around and leave themself?
If they were really looking for trouble, they would act way more agressive, than just trying to go away and definitly react to his insults.

Putting that aside, the black guy couldve left at least after the two were gone, so in the end, he really started the fight and lost it.

Attempting to understand the motivations of cruel, violent individuals is a feeble action, because such motivation is feeble to begin with.

As for the black guy (banking off of the two white guys being instigators)...people often feel to need to defend against injustice...sadly, his defense is built off of juvenile behavior and insults, which sort of undermines any noble or macho intent he had in mind when he resorted to said violence.