Russia sponsors some English-language outlets for dissidents, most of whom are pretty crackpot. When the US does that to other people, it's called promoting democracy and a pluralist media landscape (and lord knows the US could use both, though I'm not convinced that the Kremlin is the best place to go learn about them). Everything beyond that is conjecture and claims of the same apparent veracity as the blood libels against Allende.

Yes. That is the whole point. When the US does, in fact, fund democracy activities that benefit selected sides in political contests like elections, we know whose interests can no longer be separated from the interests of the United States. It does not matter at all whether such activities were even helpful or competent in any way. Just the fact that US made a serious effort to help one side in an election is enough to prove the connected interests of the beneficiary of US help and the US cannot be ignored.

For that reason alone, even if Russian help for Trump was ultimately amateurish, just the fact that they they sided with Trump and actively intervened in the election on his behalf, and whose isolationist policy changes across the board help Russia first and foremost, are enough evidence to conclude that Russian and US interests cannot be easily separated as long as Trump is president.