The person who took credit for the hack was Guccifer 2.0. He might be a Russian spy he might not be. All we have for evidence on Russia's involvement is the word of an organization who is consistently corrupt and untrustworthy so
If anything Assange has a personal vendetta against Clinton and Obama for locking up whistleblowers in particular Chelsea Manning. Her getting away with the email scandal set off a backlash. It's a bad look for Wikileaks to have vendettas against one particular person but it still fulfills the meaning of the organization to call out corruption.
Doesn't matter if it's Russia involved or not corrupt is corrupt and we shouldn't accept it under any circumstance. The CIA was probably behind the Panama Papers but it exposed to the world the bs that was going on at the top so are we gonna discredit the US government for releasing information that was to remain hidden