Earlier quoted context omitted.
Yes. The journalist in your example should not be accessory to a crime. If Manning asked for gloves to hide her fingerprints, Assange should have answered "send me the documents when you have them, but I can't help you hiding your fingerprints" If you imagine the hack being another crime, maybe it's clearer. Imagine Manning told Assange she could get the files but in order to get them she had to kill the guards at th…
'she had to kill the guards at the door' . Why stop there, while we are at it, imagine she had to commit a terrorist attack and a genocide at once and Assange volunteered to help
A journalist should not be accessory to a crime when receiving infornations.
I made that example to make it clearer, but if you don't like it I can make another one: to get the documents she needed to open the door, so she Asked Assange if he had a crowbar.
The simple fact that he didn't say "no, I can't help you with that" is the problem.