That certainly is not true of Jehovah.The Holy Writings are being made available to ''every nation and tribe and tongue.'' -Rev 14:6
It was certainly true (the OT God was the God of the Jews) until zealots and missionaries like Paul hijacked the Jewish scripture, reinterpreted it - though obviously not clearly enough of any hope of universal acceptance - and created a new religion based on Christ whose identity is still hotly disputed among believers.
