I'm saying the opposite. The only reason they haven't killed more is because they lack the capability. Israel on the other hand could kill every single Palestinian if they wanted to. Same goes with US.

Again. Hamas is lobbing unguided rockets indiscriminately into residential areas. They're not targeting military and killing unfortunate civilians on the side - they're targeting civilians. There's recorded phone call of Hamas fighter calling his parents from the phone of a dead Israeli civilian joyfully telling them he killed 10 jews with his own hands.