Just a point of clarification: Israel does not hold hostages. Everyone in Israeli custody is suspected, charged, or convicted of a crime.
Some have argued that Israel’s criminal justice system is severely broken, and that it’s very biased, and even that it is rife with wrongful convictions and lack of due process. But it is counterfactual to say that Israel is holding hostages. No one is held by the State of Israel as a civilian who was captured and held on threat of life with the purpose of being released in exchange for a political goal. You will never hear Hamas supporters name even one.
People can twist and torture the definition of the word “hostage” to the point that it becomes meaningless in an attempt to establish some type of moral equivalency, but it will never be objectively true.