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I believe it was Israel who took the land from the giants in the first place, when it was the land of Canan. Moses led the children of Israel out of Egyptian bondage in the great exodus.

They were headed to the land flowing with milk and honey that God had promised them. God enabled Caleb and Joshua to defeat the giants and it they took the land.

Palestine did not defeat the giants for sure. Joshua 1:4 maps out the territory God gave Israel.