They just happened to inhabit the region that Zionists decided that they wanted as a homeland. As to any legitimate claim on this land there is none. eg. The leading Israeli archaeologists are part of the global consensus that there was no Exodus, no Joshua invasion of Canaan & that the people the bible later referred to Israelites were native Canaanites. ie. No Abraham , no Moses , no Passover , no covenant & no Promised Land , just fairy tales created many centuries later (c600-300 BC) for the benefit of the people in temple and the monarchy at the time.
EU's Mogherini in Tehran to talk nuclear deal, regional issues (Reuters)
from the article: Sheldon Adelson invested in fight against Hagel, NYT reports