But, it's also plausible that Assange is an abusive asshole. Given the circumstances, and the story of the women involved, I'm inclined to believe he's an asshole more than I'm inclined to believe the NSA planted two women into the circle of people supporting him in Sweden. I strongly suspect something would have come out by now to give us some indication if that were true.
I've been involved in activist groups. Including some that have been infiltrated by local, state, and federal agents. It tends to come out. There tend to be clues. It may take years (and we may still find out at some point that these women really were honeypots set by some government), but it usually does reveal itself. It's difficult to maintain a completely artificial life and story for a long period of time. I know that cops, feds, spooks, will do horrible thing...but, there are limits to what they can do without being found out.
Is this one of those cases? I don't know for sure. But, I'm inclined to say no. I could be wrong.