This was made into a big deal. the army responded.

Basically, the IDF Spokesperson said that in general when someone in the IDF Reserves becomes a Member of Knesset, his service is frozen (it is considered a security risk). If a specific request is made to serve despite being a Member of Knesset, each request is weighed individually depending on the reasons and the need. Several similar requests have been approved. MK Kroizer, specifically, was approved for a limited time and for a specific mission in Lebanon. Upon completion of the mission, Kroizer is meant to go back to the Knesset and his reserve duty to be frozen again.

In all such cases, the person is told to not make anything public about being an MK or public servant  with his reserve duty service. Kroizer committed to this as well. The head of HR in the IDF decided due to the violation of this commitment to terminate the reserve duty allowance. However, because MK Kroizer claimed he neither photographed the image nor sprayed the graffiti nor distributed the photo and it was all done by others and it was done after completion of the approved mission MK Kroizer will be granted the 8 days of R&R he was qualified for.