Many things go through my mind when I read all of this:
It's hard to know what is true, as there has been a huge amount of anti-Russia propaganda in the past few years and both mainstream media and intelligence services have given us very little reason to trust them.
But let's assume that it's all true. Why are we so appalled that a foreign entity is applying the same tactics that have been used by US intelligence services for decades? Especially given that none of these actors do it for the good of their people.
Secondly, this tactic may make sense in the short term, weakening Europe, etc. But in the long term, if extreme right-wing populist strong men get powerful enough, they may prove difficult to control at best. It may also lead to war, and that wouldn't be good for Russia. Neither would a backlash in the US and Europe leading to a second Cold War be. I don't think Russian oligarchs believe that this would be good for business, although I don't know if 'their' military-industrial complex is as powerful as 'ours'.
Thirdly, why is this tactic so seemingly successful? I mean, in the sense that Brexit happened, Trump won, Le Pen's popularity, etc? Is it all because Russia is so brilliant at meddling and none of the western intelligence services are able to stop it? Or is there something there that the stealth propaganda can tap into? And what is it?
Of course, it's the feeling that many people have that they are constantly being screwed over, by all establishment political parties, be they on the right or the left (there is no left, but never mind). And rightly so, there hardly seem to be any politicians who aren't in politics to stuff their pockets and/or ego. Their rhetoric and actions don't match. Corporations and their owners are more important than the people, and people feel this, even if they don't understand how things work exactly.
Fourthly, and this is tied to my second point, the meddling isn't done on behalf of the Russian people, but on behalf of a group of oligarchs that is more tied to that part of the world (although their wealth is connected and overlaps with that of other (groups of) oligarchs). Just like the meddling and the wars initiated by western powers serve the interests of the mega-wealthy and no one else.
So, again, why do we react so vehemently to it? Isn't that exactly what 'our' group of oligarchs want us to do? Why do we have to pick sides which are equally and systemically evil? Wouldn't it be better if we focus our energy on:
1) Supporting politicians with integrity and ideas that serve the people? Demand is high at the moment.
2) Finding ways to prevent oligarchs from controlling the economy, politics and society at large?
Okay, and this is assuming it's all true, even if it looks a bit like Glennbeckian epistemic closure to me. If it isn't true or exaggerated, it's all propaganda that could lead to war, by riling up nations against each other (rather than against the oligarchs). And when Wikileaks or whistleblowers release e-mails or some such that contain really damning information, they can be eliminated without trial (as a deterrent), and the information that is leaked, is simply ignored or labelled 'fake news'.