Hamas doesn’t want a ceasefire. They had one and broke it. They’ve been offered another and refused it. If anything the pro hamasians should be chanting no ceasefire non ceasefire.
There was also a cease fire in place when the October 7 attack took place. Break a cease fire to kill over 1,100 and take around 250 hostages, then ask for another cease fire. Makes sense to a lot of people, particularly on the far left like Johnson.