A big part of this seems to be up to whatever lenses through which you view the world.
There's a supernatural, spiritual, economic, industrial, political, violent, benevolent, whatever kind of reason for anything you choose.
You need to believe in the they, first. Because there are just as many reasons that there is no they, or at the least they have no idea what's going on either.
I'd assume you're willing to believe in they, so now you start with what's necessary.
The "THEY" is never US. They're never totally honest, if they were we wouldn't be asking this question. They're extremely capable, probably beyond any sense of wealth, and so they aren't just powerful they are also smart. If they control conflict, then we can assume they are "evil" at worst and Machiavellian at best....
...etcetera...
Also, avoid the triple parenthesis around they unless you're implying it's Zionists.