If I lived in SF- i would be concerned that something major has changed. Your response describes reasonable questions in a level playing field where people have hope that the system works.
I don't think these people have hope in the system anymore. They're trying fundamentally different approaches rather than just giving up.
If they are willing to go after specific employees like this in spite of perception damages that come with the approach, they probably aren't averse to the perception damages that violence cultivates either.
I just wanted to point out, it's _not just the economic marginalization_, it's the cultural mismatch that fuels so much frustration for those in the outside group.
Of course the economic stuff is easy to measure (being numbers!), but stuff like calling yourself a robot (the develop calls himself a robot in his soul), having employees wear different colored badges according to their privileges and so on are cultural differences that people don't like and feel compelled to call out.
This is the behavior of desperate people who have lost hope that our government functions and are motivated to action.
This seems like the natural conclusion of our government's inattentiveness to it's citizenry. Violence isn't far when folks have achieved this level of frustration.
The last line of the link makes it clear that Google isn't going to be the only target. "All of you other tech companies, all of you other developers and everyone else building the new surveillance state--We're coming for you next." Burn the witch!
I don't think people should be resorting to violence out of principle, but I don't think it's reasonable to expect that "folks" who are economically marginalized should put up with this because "manners."