Hamas held military exercises over the weekend, which included some test launches of Qassam rockets into the Mediterranean that caused Israel's Iron Dome defense system to mistakenly deploy.
Video and photos of the exercises from Hamas websites shows that Hamas' entire exercise is a series of intended war crimes.
The rockets themselves are aimed at civilian population, which is a war crime.
Hamas held much of the exercise in urban areas, even showing tunnels in residential areas, meaning that they intend to use human shields, which is a war crime.
And the major focus of the exercises was to take Israeli soldiers hostage, which is a war crime as well.
Here's video that shows the focus in kidnapping very clearly.