I'm not sure there has been an illness of acting against US interests (intentionally) until recently. Flynn is part of this cabal of Russian lackeys that Trump either recruited or inherited from his own business dealings with the Russian mob. Flynn seems like an exceptional case, and Obama probably could have put him under all of the prisons, though we can't say for sure.
When it's the Saudis or the Israelis, there is at least a direction of US policy that is consistent with our interests (I say that with all sense of irony, I know). We've maintained toxic relationships that hurt us, but the intent is not to hurt ourselves. That's where this new cabal is different from the old one. They don't like our democracy. They don't like stability in eastern Europe, particularly Germany. The lobbying is now being done directly by the oligarchs- it has reached an entirely new level.