I mean they are involved in it - stopping it going in.

I’m old enough to remember when Western governments were against genocide and ethnic cleansing, spoke out about it, and occasionally did something to stop it.

The Leave campaigns were largely funded with Russian money, and there were massive pro-brexit disinformation campaigns by Russia on social media. So, not caused by, but massively aided by Russians. Very much like Trump - both projects designed to cause division in Western countries.