Earlier quoted context omitted.
You can claim that this is all pathos and that this action is not merited on the facts, but your sardoncism about collective action seems misplaced. I'll even agree that Heymann is unlikely to be fired, but to equate either TarenSK's suggestion or petition signing with a lynching is both unfair and unkind.
http://en.wikipedia.org/wiki/Kony_2012 Edit: In my opinion, a demand for someone to be fired shares the same social DNA as lynching. Driven by the same forces: an angry crowd demands that a scapegoat be punished to appease it.
This idea that people in the government are unfireable is a disease. If you fuck up in the public sector, you get sacked. Expecting the same of the government is not equivalent to torture and murder.