He is not being prosecuted for publishing. That’s the game here. They found a “gotcha” to nail him on something else. Al Capone didn’t get charged with being a mobster, but they found a way to get him. Same deal.
Right, because by assisting Manning in decrypting the files, Assange crossed the line that would have protected him as a journalist under well-established court rulings protecting freedom of the press.
He did not assist Manning in decrypting any files. Manning only accessed plaintext files. You are likely confusing the discussion related to cracking a password hash, which was unrelated to the documents.