clearly killing children by snipers is a war crime and I think Israel has committed quite a few- but again NOT genocide
The palestinians are not a distinct ethnic group - they are the same arab population as exists in Jordan, Syria and Lebanon- indeed many of them are descended from arabs that moved to the region called palestine from those other place precisely because immigrating jews were improving the land and creating job opportunities
The Allies firebombed whole cities wiping out thousands of lives- but it was war not the documented systematic destruction of a given people
The Serbs committed genocide by systematically rounding up bosnians and murdering them in trenches . The Israelis are not doing that- it is war- war that Hamas started