Conscientious objectors are not jailed.

Anyone can just do community service roles instead of the military. Sounds like only people who completely refuse to help out at all are punished.

https://en.wikipedia.org/wiki/Sherut_Leumi

Sherut Leumi (Hebrew: שירות לאומי, lit. 'National Service') is an alternative voluntary form of national service in Israel, as opposed to the mandatory military conscription prevalent in the country. It is designed for individuals who do not meet the eligibility criteria for service in the Israel Defense Forces, or who hold conscientious objections to military enlistment. The program primarily was created for religious Jewish girls aged 17 to 24, although it is open to all applicants who cite diverse grounds for their decision.

The majority work in schools, but can also work in places such as special education, administration, hospitals,[3] law, geriatrics, nursing homes, health clinics, teens at risk, internal security, disadvantaged communities, immigrant assistance, and many other organizations. Acceptance is based on an interview via a placement organizations that try to find the youth appropriate skills, interests, and needs.