My theory as to why people act this way is that they do so to give their lives meaning. That, or there is something that makes their life meaningful they believe the "enemy" will take away. For instance "Google spying on my children" -> "Google is the enemy". They see Google, the NSA, Microsoft, etc, as a cohesive group that is "after them".
But in absence of this conflict, or the external meaning that is the cause of the (perceived) conflict, they wouldn't know what to do with their own existence. Religion, alcohol, and hedonism may end up filling this gap.
In contrast, those who have a self-defined objective see the world as a massive system of problems to solve (or not solve). There's no singular "enemy", just a huge number of people who all have their own motivations and ideals. "Google" is nothing more than a tightly-bound collection of humans.