So, ransom notes are written with the original writer's handwriting? You're really naive! You should remind yourself that this took place inside an army base - where no Palestinian dares to set foot! Settlers, if caught, can always claim that they came to complain about something or ask for the army's help with some made-up incident. This incident is no different than drug related incidents. As long as the drugs are being used/sold within Arab locals, then the police looks the other way. Once it creeps inside Jewish locales then the police puts all its resources to stop the problem. How will the army deal with these settlers now is anybody's guess. But the fact that no settler has ever been prosecuted for "price tagging" mosques only encourages settlers to attack the army and the police as we've seen on many occasions.
Palestinians report IDF airstrikes on Islamic Jihad targets in southern Gaza Strip (Haaretz)