''Either way it's an awful way for civilised human beings to behave''. THIS IS WAR!!!!
With the Arabs it can be some unknown group?

Lebanon on June 12, 1982: Zechariah Baumel (body recovered in 2019), Tzvi Feldman, and Yehuda Katz.
Ron Arad, an I D F F-4 Phantom II navigator, was lost over Lebanon on October 16, 1986.
nothing has been heard since ,and he had a wife ,how long can/could she wait??
Guy Hever disappeared on duty in the Golan Heights on August 17, 1997.
The bodies of I D F soldiers Goldin and Oron Shaul have been held in the Gaza Strip by Hamas since 2014......and there are others!!!

Israel's official policy is not to release convicted terrorists for the release of abducted civilians or soldiers. In practice this policy has not been implemented since Menachem Begin's prime minister-ship, as Israel showed willingness to secure the release its M I A's (and in some cases of soldiers' remains) in exchange for a large number of Arab security prisoners held by Israel, even those who have killed Israeli civilians, and has done so in multiple occasions.

Gilad Shalit is a former MIA soldier of the Israel Defence Forces (I D F) who on 25 June 2006, was captured by Hamas militants in a cross-border raid via tunnels near the Israeli border. Hamas held him captive for over five years, until his release on 18 October 2011 as part of a prisoner exchange deal.