Fair theory. They're mad about something. I'll tell you why i think it's not that or that and also a whole lot more.
I'm going off memory so my details might be off. Manafort going down was weird. They went and seized all his shit. Trump talked all kinds of shit about him. Q basically confirmed, like you said.
Manafort worked with the fucking Podesta group. That's why we all accepted he was a plant so easily. Shortly after he went down, the Podesta group closed (pretty sure that was the timing). They were lobbyists.
During the time Manafort worked with them, they were lobbyists in Ukraine. And the lobbying was pro Russian leading up to the Russian annexation of Crimea, something Obama condemned. So Mueller going after him but not Trump made a ton of sense. Back then I was pretty on board with the Mueller white hat theories.
Your theory is totally fair. But there's one more thing that might just tie back. That's the fucking WW3 shitshow that just happened in Ukraine. The one that was the worst thing in the whole damn world and then disappeared instantly.
Whatever the fuck that was, i think it was a big deal. And given the players involved here and their past in exactly that region with those two countries, it just seems like such a dramatic shift around that event should be considered.
And we might never know Wtf that was about. Lot of fucking international mysteries right now. And as much as we follow every happening here, i suspect the answers to recent events are all about fucked up geopolitical happenings.