"He means because God gave it to them"?????
That's just your own wong interpretation, he never said that.

Ofir Akunis saying: "This whole land is ours. All of it.” just means that legally that land belongs to Israel.

When British Mandate Palestine was  divided into  Trans-Jordan  and Jewish State with the Jordan River being the boundary between them. Trans-Jordan (Jordan)  got 78% of  The remaining 22% consisting of the land between the Jordan River and the Mediterranean was to be the Jewish state. This was first approved at San Remo's convention then this was enshrined in the Palestine Mandate signed by the League of Nations in 1922.

On June 30, 1922, a joint resolution of both Houses of Congress of the United States unanimously endorsed the "Mandate for Palestine," confirming the irrevocable right of Jews to settle in Palestine—anywhere between the Jordan River and the Mediterranean Sea.

Nothing since that time has canceled or superseded those documents which remain valid.