Earlier quoted context omitted.
This should be a lesson for all voters across the world - think for a minute before voting. At least try to understand what you're voting on. We can blame all we want on the media, politicians etc etc, but in the end, we can't deny Brexit is the result of a properly, democratically conducted election - voters need to take at least some responsibility. No amount of "voters' remorse" is going to help now.
I can deny it: https://en.wikipedia.org/wiki/Alleged_Russian_interference_i... Of particular interest is where the massive pile of cash that funded the Leave campaign actually came from.
So the US managed to destabilize the Soviet Union. Threats from NATO and strategic nuclear weapons forced the Soviets to spend so much on defense that the civilian economy was destroyed. And yes, corruption and incompetence also played a huge role. Add saturation with VoA messages about the US consumer economy, and the Soviet Union collapsed. And more recently, they messed with Georgia, and finally engineered Ukraine independence. Not to mention Syria.
Russia has also sought to destabilize Western Europe and the US. For a long time, it was mainly messages about the communist paradise. And in the 60s, promoting protest against the Vietnam war, and pushing isolationism.
But then, in the late 80s, the message shifted to distrusting government, conspiracy theories, etc. I mean, look at RT! And more recently, basically the alt-right, with its overt racist overtones.
I don't know the UK situation well, but it's pretty clear that Russia promoted Brexit to destabilize the EU, and so NATO.