Can't you see the bigger picture?
This is all part of Iran's plan to destabilize and take over the Middle East. Hamas is a small part of this along with Hezbollah, Muslim Brotherhood, al-Qaeda and other Iranian proxy forces.
How many deaths do you think that would cause?
The Iran/Iraq War had 500,000 casualties, 100,000 of them civilians.
That conflict has been compared to World War I in terms of the tactics used by both sides, including large-scale trench warfare with barbed wire stretched across fortified defensive lines, manned machine-gun posts, bayonet charges, Iranian human wave attacks, Iraq's extensive use of chemical weapons, and deliberate attacks on civilian targets.
The discourses on martyrdom formulated in the Iranian Shia Islamic context led to the widespread usage of human wave attacks and thus had a lasting impact on the dynamics of the conflict.
You are naive to think If Israel was removed from the map there would be peace.
Have a look at the history of The Lebanon if you want to see what could happen.