The first thing I would ask is why are we bombing yemen. Could it be because they are harboring terrorists and we have a reason to be doing it. What is going on to cause the bombing. I would then say do I need to know that right now, does the general public need to know it right now. Or might that info have hurt the operation and diminished our chances of accomplishing what we need to.
The court wont have to try and determine his intention he has stated his intention and how he hates America and what it stands for.
Would you agree that it is not practical for the general public to know everything? Would you also agree that it is in our nations best interest for classified information to stay classified until a time when it is determined that there is no need for it to be classified? Would you then also agree that these leaks are not only potentially dangerous to the U.S and its troops but also harms the diplomatic relations with other nations? If you agree is that not enough to charge this man and send the message?