So what that he encouraged or developed something, he is not the person who had actual access to this information, he never worked for any agency in USA where he would have to promise not to disclose information, to him (or anyone who doesn't work for such agencies) status of any 'secret' information is completely irrelevant, as it should be.
For example, if I egged on some general to disclose top secret information about some project and then he did disclose it, it would be on the general, not on me or anyone who encouraged him. HE IS THE ONE WHO PROMISED NOT TO DISCLOSE IT NO MATTER WHAT, not me, not anyone else.
I am not a 'right wing', I am not a 'left wing', I am a libertarian, anarcho capitalist, it puts me completely outside of what is considered to be normal politics in the USA by the way and I say that Assange has done nothing wrong at all and he is being terrorized because he embarrassed people who have power.