You're right, the root cause here is jealously, boredom, and a typical bully attitude.
However technology is a core feature of the root cause that the protesters claim. They are not angry at moderately wealthy workers in general, they are angry at moderately wealthy workers from technology companies in particular. They make this excruciatingly clear.
And do not even think of telling me that the only wealthy people in SF are those working for technology companies. That is bullshit, and you know it.
They are angry at companies who provide corporate busses to make neighborhoods more comfortable for their employees than they are for other people, rather than supporting public infrastructure that everyone benefits from.
As to your comment about 'bullshit' - you seem kind of angry.
The irony still stands: these people benefit from tech workers' products, but they still want Googlers to "fuck off" and "get the fuck out." So it's NIMBY-ism -- just like the placement of cell towers, Google employees have to live somewhere. People want to benefit but nobody wants to shoulder the cost.
There's no irony unless you see the world in black and white.
It's not particularly surprising that most people use Google, given that it has a monopoly in search.
That is irrelevant to the possibility that the influx of Googlers - aided by private infrastructure from the corporation - may be destructive to the community that is protesting.
No, only those protesting modern technology.
Protest Gitmo with modern technology all you want. Nothing wrong with that.