If Russia had any role in hacking the DNC or John Podesta, we will never know. The CIA intentionally uses Russian malware and disguises their tracks to look like Russians. So, the government has no credibility to debunk Wikileaks’ assertion that a DNC insider leaked Podesta’s email...
Was that ever even in question? We already knew, months ago, that John Podesta was the source of those leaks. The only thing anyone was unsure about was whether or not it was one of Podesta's staffers or if Podesta leaked it himself for some reason.
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So you go to a party somewhere, and all of the people at that party are the parents of your daughter's friends (they all go to the same school and hang out together). An hour in, the woman who lives three doors down from you comes up and whispers to you with a smug expression on her face, "Jenny just told me that her daughter isn't getting to do optionals this year even though she got a thirty seven all around. Which is funny, because Amy's girl is moving up to optionals and she only got a thirty five. Sounds like Jeffrey was involved, doesn't it?"
You know who Jenny is, and you know her daughter. You also know who Amy is, and you know her daughter too. You know that Jeffrey is the head coach of the wrestling team, the diving team and the gymnastics team at your high school. But beyond that, you have no idea what the fuck this person just said to you, partly because it's laced with jargon, but mostly because you aren't part of the little social clique that's been passing around "Jeffrey's been sleeping with Amy" rumors for the last six months. You aren't part of that sub-culture, so you don't get the context of what she's trying to imply, and the idea that Jeffrey would be making decisions based on favoritism or his desire to impress Amy's mom isn't consistent with what you know about him. So to you, the smug little trollup who just made this comment comes off as condescending and petty, and the moment she realizes you don't get the joke, she'll go back to her corner of the room and try again with someone who DOES.
That's the DNC in a nutshell. The hacks had nothing to do with the Russians, that was mainly Clinton/Debbie's clumsy and poorly-coordinated attempt to establish a Trump/Russia link. They knew the link existed and they assumed everyone else did too, so claiming the Russians were involved in the hacking of a DNC server felt to them like the kind of rumor that would have gotten traction fast. Trouble is, the DNC's upper echelons live in such an impenetrable bubble of self-referential affirmation that it literally never occurred to them that nobody OUTSIDE the bubble was familiar with those rumors. "Trump is sleeping with Putin" is an inside joke in DNC circles and has been for years, so the idea of the Russians being involved in the leaks totally makes sense... but you wouldn't actually KNOW that unless you were part of that inner circle, so for everyone who isn't privy to those inside jokes, the accusation just looks stupid.