Hamas refused to extend the temporary cease fire, demanding an end to the siege of Gaza.

A siege is an act of war, just as much as firing a rocket or dropping a bomb. Declaring a free-fire zone inside Gaza and shooting at anyone who goes there is also an act of war. If Israel wants a buffer zone, it should create that buffer zone inside Israel's borders.

The tunnels built by Hamas could be used to attack civilians or soldiers, but Hamas uses them to attack soldiers. And taking soldiers prisoner is not "kidnapping". However, the rockets launched by Hamas against civilians are war crimes.

More about the dishonest terminology used by Israel and Hamas.