Individuals now get to heaven only one way -- accepting Jesus as their Lord and Savior. There were many apostate Jews (physical Israel) in the time of Abraham and following that did not go to paradise. It has always been the case that salvation comes but one way -- by grace, through faith. God never changes.
Man is a credulous animal, and must believe something; in the absence of good grounds for belief, he will be satisfied with bad ones. - Bertrand Russell