Israelite tradition versus the Sabra

Peace to the Honorable Rabbi Shlita,
I wanted to ask the Rabbi, is there a logical explanation that if God, the Holy One, wants to show the children the way in which they will worship Him/has a purpose for the children, etc., then He will reveal Himself to the entire world and convey His commandments to them.
But the religious reality of the Jewish tradition is that God revealed Himself only to His people and gave them only the Torah.
Doesn’t the Rabbi see the credibility of Jewish tradition being greatly weakened by this reality?

Best regards,
Israel