That is an oversimplification of the causes of the Revolution. Anyway, I thought you seemed to be seeking to understand why people were upset about the extra-judicial killing of Anwar al-Awlaki, but it appears that I was incorrect. In short, it's about trashing legal doctrines that slowly developed over nearly a thousand years in order to protect individual rights, and tearing down "innocent until proven guilty in a court of law" that's supposedly a bedrock principle of justice.