When the Israelites took over Canaan, it was the trend of the time. The Israelites were not alone. Several migrations were in the search of land to settle themselves in. And it was a custom of all migrations to exterminate local populations to prevent further insurrections and endless wars.
With regard to the "Palestinians" they were the occupiers; not us. The Land of Israel was our land for about 4000 years. We never left it of our own freewill. We were forced into exile. Then, in the 8th Century ACE, hords of Arabs invaded the Half Crescent and occupied the Land of Israel.
Check History, there was never a country called Palestine. The place had become always a province of this or that empire starting with the Romans. Besides, as we returned to our land, we paid for almost all of it by bying it from local occupiers. BTW, we did not have to; and we even offered them the chance to coexist with us. We even agreed with the partition according to the British white paper, but they refused. They wanted us back in exile, as they opened a war of agreesion with the intent to push us into the sea. They lost. And it was during this war of agression that we could add more of our land, which we had not bought.
We are still willing even to this very day to live together or alongside each other, but the only thing they agree with is for us to leave the Middle East. I would like to see America with that accommodating spirit if the Mexicans ever decided to come for Texas and California that once belonged to them and they were never compensated for their loss. But of course, this idea is not of any one's interest. America is not Jewish.
Ben