Nobody cares, until they're told to.
Countries have been interfering with the leadership selection of other countries going back, oh, say, forever. Hell, the head of the American CIA openly bragged about helping to put Yeltsin in power in Russia on national television. This stuff goes on constantly, and while I understand that anything leading to the Cheeto Führer's ascension causes consternation it's just another case of extremely selective outrage. Hell, the frigging CEO of Google - Eric Schmidt - was working for both the Obama and Clinton campaigns and nobody outside of the Republican Party cared even a little (and both of those campaigns made quite a deal about their social media manipulation savvy). It's hard to see this as anything other than another case of "It's only bad when people I don't like do it," and while people are entitled to that position they should expect a little bit of ridicule along with it.
Another thing - nobody involved on either side cares if it's ethical, and they barely care if it's legal. They do care about potential costs and whether or not they can stir up a nice pot of outrage. That's all. Politics is an ugly, dirty business and that won't change in any of our lifetimes. They're all disgusting shtbags, and while you are entitled to support or adore the shitbag of your choice, please don't pretend they're not a shitbag because it's embarrassing to watch. Get over it and Move On.