To be fair to WikiLeaks there is very little evidence that Russia had anything to do with the DNC hacks. The FBI never had access to the servers and the the whole Russia hacking narrative relies on the DNC's claim of "trust us when we said this is what happened".
Similarly the recent Twitter revelations on Hamilton68 showed that the Russian bots on manipulating social media was more or less BS.
Who know what really happened, but what may have happened was that the hacking was blamed on Russia instead of say China, or [insert foreign adversary] because the FBI panicked when trump was elected after using the Steele dossier to spy on his campaign and needed a narrative to justify their actions.