His claim is that the source is not Russia --people who were happy to see Julian leak things (and believe his leaks) while Bush was president are now calling him a puppet of Putin. I have no idea if Putin has goods on him. Or whether Julian is just a medium. It is, however, interesting to see people shift along political axes though.
If there was a Russian angle, I think their aim was to cause uncertainty regardless of winner. Be it Trump or Hillary, whoever the winner was, the voters of the opposition would question the results --despite there being no actual election hacking (altering the vote count).
One interesting thing though is that since the media writ large expected Hillary to win, had she won, this same evidence would have been "page 6" news and would have been rather quickly forgotten but for a few "sore losers".