The terrorists will shoot rockets from next to a hospital or school hoping Israel will shoot back and hit the civilian target by accident.
The terrorists will also hide weapons in innocent families' homes so that they become targets too. If Hamas threatens your family with death if you don't let them hide Russian made rockets in your home, you most likely do it.
Of course if those rockets blow up by mistake or Israel targets those missiles....Hamas has a good news story for the BBC, Al Jazeera, msnbc to blame the "evil Jews" for killing "innocent muslims."