The only person doing that, with your whataboutery, is you.
Hamas in their disgusting and cowardly attack, killed 1400, Israel has killed, so far, 15,000 people, inc 5000 children, displaced 2m people, now with little food, no housing, no medical services, 100k injured.
They also show no signs of limiting, let alone stopping.
How many Palestinian children should die?
I guess your answer is "However many it takes until Hamas is destroyed"