It was, back when WikiLeaks seemed to be politically independent. Now it's hard to tell whether I'd be supporting worthy efforts to promote free dissent, or whether I'd be supporting one man's (or a small group of people's) interest in influencing U.S. politics in ways I find objectionable.
I'm also not sure I see the connection between 'dissent' and the dissemination of stolen private emails.
A good reason to support Wikileaks.