This is not true, they only killed the people who fought back, you have to understand that the British used to own the land and gave it to the UN. Its not ethnic cleansing if you leave people behind, they didint try to kill EVERY Palestinian.
This isnt a valid argument, religion is based on opinion and faith, if you said that "God told me to have this Lamborghini and I have permission to take it from its owner" it would be anarchy, if that actually worked in the real world everyone would be taking things. I mean, i support the Israelis but this argument doesnt really work.
Israel fought in four wars against Palestine, they won every single one of them. Sure, they were funded by the UN but that just means that there are plenty more people supporting Israel's sides than the Palestine's side. In one of those wars the Israelis were outnumbered 2-1 yet they still won. There were 39 missles that touched Israel soil.
Sure, there may have been a lot of children killed, but you need context under it! How do we know the Palenstinians didint use them to do their dirty work, or how do we know they were not caught in crossfire because of the terrain of palestine.
The Palenstinians never lived on the land forever, they were never a country until the UN decided to give Israel the land, they were just simple villagers and there were Jews there. About 10,000 of them, but today they were all forced out of the country.