A question about the alleged Unabomber

There is a new book about Ted Kaczynski - Harvard and the Unabomber:

http://dissidentvoice.org/2013/11/technocracy-vs-humanism-then-and-now/

My question is this: why is violence and disruption caused by the ruling class acceptable, while violence in response to the actions of the ruling class is not?

The violence and disruption caused by the ruling class, when it is portrayed at all, seems to affect an unnamed mass of humanity (about whom we don't give a shit), while the publicized acts of people like Ted Kaczynski are always associated publicly with a list of gifted individuals, some of whom will be said to be "the most brilliant and visionary ... scientists of our time".

Are the rich allowed to kill us because we are worthless, while they and their friends somehow have value? Is the pursuit of knowledge, especially scientific knowledge, more important than basic human kindness? That's the way it seems to me.