Buddha taught that there was no God, therefore there were no morals, that the universe was deterministic, but that even so humans should strive to act with loving-kindness. Perhaps in your estimation this is a simple truth.
Jesus' call that one must metanoeo (let one's mind be changed and one's heart transformed) or perish, while related to the Jewish teaching that God is close to those with broken, contrite and humble hearts and found by those who seek him with all their heart and soul, was a new and radical call, not a mere reminder of a simple truth clearly as he claimed himself to be the Truth.
Jesus' call that one must metanoeo (let one's mind be changed and one's heart transformed) or perish, while related to the Jewish teaching that God is close to those with broken, contrite and humble hearts and found by those who seek him with all their heart and soul, was a new and radical call, not a mere reminder of a simple truth clearly as he claimed himself to be the Truth.