Bingo.
As a matter of fact it does not need to hack ALIS. It is sufficient to prevent an update of data into ALIS by whatever means for an aircraft to refuse to fly. Last one I heard was 45 days.
Additionally, ALIS also has mission assignment and command functionality. So if you do not have a link at least some aspects of getting an aircraft ready to go out and kill someone or something cannot be done.
It is truly what it is - "If the wars were fought using the Cloud". Who, when and how in NATO countries agreed to it needs to be tried for grand treason and hanged. Publicly.