First, that's not much of a parallel. The morality of generic murder is clearcut, the morality of interference with other countries elections is not. Not everyone subscribes to prime directive. As a Russian I personally appreciate that someone is at least trying to instill some positive change in Russia.
Morals aside, you said
> It's curious this is virtually never mentioned amidst all the accusations of Russia involving itself in US elections.
I told you why. Because whatever the US did was not effective, and it's not as newsworthy as things that are happening in the US and affecting Americans.