The late Yeshayahu Leibowitz was not an ordained rabbi. The rest of your post has probably the ring of truth. I also tend to view Shamai Leibowitz as a guy ready to stand up for his ethical actions and as a whistleblower. Unfortunately the article here does not say anything new beyond what we knew one year ago. In particular we still do not know what the real content of the leaks is (unless you were lucky enough to find out on the web). So far it does not seem to involve anything critical (like security and the like...all overused pretexts and generally false flags), but rather uncover the usual techniques of (strong) lobbying and possibly corruption.
Israeli troops shoot, injure Palestinian crossing Gaza border fence (Haaretz)