First, maybe they still keep a sliver of hope that the Israeli state will be at least marginally morally superior to a terrorist organization.

Second, many do call for Hamas to surrender.

because an end to the ethnic cleansing is more important than waiting for surrender, if that's even possible given hamas' disrupted command structure and israel's constant creation of new terrorists

a ceasefire provides room for diplomacy that might lead to concessions from both sides for their atrocities, and thus might lead to peace and equality

we have seen in the west bank what surrender without a ceasefire or sustainable peace looks like, and it is very bad (see this article for an example)