I'm with Glenn Greenwald on this. While it is entirely possible that the email hacks were perpetrated by the Russian government, it is unreasonable to assume it is true without clear evidence being presented. US intelligence agencies have a history of using propaganda to push a political agenda. They are professional liars. Let's see the goods.
So, on one hand we have the US intelligence telling us Russia did it.
On the other we have Julian saying it was an insider.
The cia/nsa/fbi have a long history of lies and manipulation of facts.
Julian has a perfect record of honesty.
I'll give you 1 guess as to who I believe.
In the end it doesn't matter. The US is being hypocritical to complain about something they do more than any other. And if 'interference' means 'exposing their dishonesty and corruption' then interference is a good thing.