Very easy to answer: US deep state, senate and lobbies (those behind the senators).so who (or what) does everyone think sits on the throne of this world? What group faction etc whatever is at the very very top of the pyramid? Some ultra exclusive secret society? Nephilim? Some royal bloodline? Caesars heirs? Something non-human?
Maybe tax strategists have interesting ideas on that.
As for Soros, it seems quite obvious that an illegal trend like the african migration into Europe that requires massive amount of money and logistics cannot be put up, let alone endured, without the green light of the US. Even the money come from there (or from the Saudis, basically US safe deposit box, who paid for the last of the US wars in the region, btw).
Ask yourself also why no media has ever had a coverage on where all the money behind this comes from, who's behind all this etc.
No private society without the green light of the USA and its deep state and secret service could manage that. Look at panama papers: they popped open like nothing. On this: radio silence.
How easy would it even be to go interview some of the migrants and expose what's behind this? But nothing, 0, nada. I remember reading half of an interview of a northern-african muslim terrorist arrested in the very early 2000, promising that the worst was just about to start (so true). After that, 0 intel on the causes.
So the actual question is not who but why. Again, frankly speaking, easy explanations are the most plausible. And 20 years after the beginning, and after having been able to see the effect of this strategy, it's easy to guess.
The trend started very early 2000, right after introduction of EUR, right when Europe was rising and trying to unite even more.
Now ask yourself: why would the US be happy about a strong and united Europe, a homogeneous european society and a strong economy and currency (EUR) that, back then, some even started to hypothesize could take USDs place in many kinds of transactions? Especially when they themselves, example of cultural integration, are a fucked up society where they ended up killing each other at home?
Fear of loss of power has triggered the libyan war for much less
That's by the way the same reason US finally realized the threat is now China, that is large, powerful, homogeneous or actively and effectively treating separatists. And we see the amount of aggression they can't even publicly hide to try to contain such a geopolitical opponent. As China is not (yet) backing off, we can easily expect further public escalation of hostility over there.
And that's the same reason their main goal is always to "export democracy" everywhere.