Assange is not a US leader,
and I believe that all US presidents are really Americans who always defend their very own homeland, mostly if it is the homeland who made them great and succeed to become President. They are not perfect mostly if they have to deal with two ideologies when seated and most of the time pressured with those believers their peers in political belief who tossed them to become one. Believe in your leader and because he is not perfect you can criticize him sometimes but rely on him because he/she is for you.
Assange is just a revealer of something hidden, regardless if it will create chaos or not, something should be hidden of course, that is why the CIA which defended USA causes kept their operation secret.
Politics, it seems to me, for years, or all too long, has been concerned with right or left instead of right or wrong.
The Radical Center: The Future of American Politics