Hamas offered release of hostages in return for a total end to hostilities and Israel declined. Don't lay this shit on the resistance; Israel has the power to stop the killing any day they fancied it.
There is no "end to hostilities" as long as Hamas exists. That should be obvious by now - Hamas' demands to any form of peace are a total farce and only the dumbest idiots would fall for that. Want a ceasefire? Release the hostages. Want permanent peace? Disarm the terrorists and come to negotiations.