Do you really doubt that the hackers were Russian? If so, why?
There is doubt because even Americastanian government agencies wouldn't claim certainty.
And the evidence.....their
word that it was highly likely to be Russians.
(They were wrong about Iraqi WMDs. They could be wrong again.)
Add to this the question of whether it was Russian government aparatchiks or unaffiliated civilians.
The leap to certainty appears to only be among the party faithful, who entirely ignore the possibility
that a DNC insider was feeding Wikileaks. So I'm comfortable not staking a claim upon who did it.
I've covered all this before.
Nothing really new has been revealed since.