In addition, former British ambassador Craig Murray (a man with a solid reputation and little reason to lie) claims to have personally met the source and insists that the source is definitely a political insider without ties to Russia.
https://www.craigmurray.org.uk/archives/2016/12/cias-absence...
Assange has no reason to implicate Russia. It would also be very, very easy to give a disgruntled insider the email trove or help them stumble upon it.
Source: https://motherboard.vice.com/en_us/article/how-hackers-broke...
I don't think a disgruntled washington insider did that! I could be confused and there's another set of emails that you're referring to. It's impossible to keep up on everything lately.
Quite the contrary: If I definitely know that my target is too incompetent to check what he clicks on, or that he forgets his password every week, it's waaay easier for me to achieve my goal.
There are plenty of people that value money over morals.
In no way is Assange most likely to know what happened, in the same way that a Tor exit node is not most likely to know who originated a message it delivered. Those with actual intelligence assets are far more likely to know who the ultimate source is.