> who specifically are "the establishments"

What you could call 'the establishment' in the modern Angloamerican-centric West is a collection of old money aristocrats, long-time ultra rich billionaires and their holdings in defense, heavy industry, and media sectors. This is a rather broad definition and it does not elaborate some of the factions among it, however it more or less accurate. As an example, Eisenhower called a part of it as the 'military-industry' complex. And that is what most of the people know 'the establishment' as. But of course, anything that is involved in this complex web of monetary and power interest is a part of it.

They are gung ho about it because especially in the Angloamerican West, at least half of the public justifies and rationalizes whatever they do. In some way or the other. So they get away with it. From mass spying to Iraq War lies, from the scam that led to the 2008 crash to anything you could pick from the latter half of the 20th century and early 21st. And because there are no repercussions for anything and they can get away with anything, they really dont care what anyone thinks. All that is required for them to push their stuff is a small percentage of public buying into their agenda and making enough noise. The most clear example of this can be seen in the UK - the establishment got used to getting whatever they want regardless of anything that they recently started just being honest with what they want.

> who would likely support the movement

That's just more of the 'blaming others for what the domestic psychos are doing'. Its a really nasty habit that is not easy to throw off.

Look. In terms of spying, you can bet that every single major actor has all the information that matters regarding the other major actors. From latest weapons' details to critical complexes and installations. For, if the satellite technology was not enough, there is the long-standing institution of double spies that leak info to both sides for many reasons, one being the need to tell about what you are doing to your rival so that the rival wont act on suspicion, ending up creating major conflict and even nuclear war.

So this kind of thing - mass spying on people - has absolutely NO value for things that actually matter. What every superpower needs to know about each other, they already know. And if they dont know something and they need to really know it or confirm it, its not the random public that they would spy on - it would be the rival intelligence agencies and the target would be their actual IT infrastructure. Actually even that is not needed - just pay enough to someone and you will get the info you want.

So, nobody has any interest in whatever the random Joe in another country is doing. Except that country's own establishment. China has no interest about some random schmuck going home somewhere in New York is doing. And the US has absolutely no interest in what the street seller somewhere in Beijing does.

But ALL of them have an immense interest to know what their OWN people are doing.

So, dont seek the blame outside.

> So would you expect it to be like an aggregate of different government agencies that would post fallacious comments?

No. It will just institute and normalize mass spying like how the patriot act was intended to, but failed to do.