>>516632The star of david was the sign on the "red shield", it was the sign of the "shop" owned by the first Rothschild back in Frankfurt/Germany (the star was red, hence red shield => Rothschild). The meaning behind the star is way older of course.
Yet the Rothschild family started to buy up land for farming in palestine since around 1850, owning more and more of it. Even then, they made long term plan to own this land for jews sooner or later. They also funded jewish settlements to that region.
It is rumored that since this sign was used by the Rothschilds, they intervened in 1948 and said this will be the sign to go with while the people actually wanted something else. This last part flew around pol a few years back with far more details though.