OP:   Couldn't*  care less.   If he could care less, then he cares.

If you just watch the guys body language in that protest video, its very telling. 

He's (no offense to anyone) clearly a Magic the Gathering geek, who really never was that great at social interactions, communicating, or interacting with people in general.

He's probably pretty shy, and maybe even has asbergers.  Or something similar. 

There may (big may) be an element of sociopath there as well.  The complete lack of empathy/sympathy/emotion is extremely, extremely abnormal, but very common for psychopaths and sociopaths.

The way he walks like a robot, has no emotion, bumps into the guy, tries to move around him, all the while not moving his umbrella, making no facial expression, holding his starbucks ....

This may just be how he is. 

Along with that would come ridiculous comments about getting fat and repeated mentions of his cat.