Jesus referenced the Old Testament continuously throughout the New Testament. If the Old Testament is irrelevant, then the new is irrelevant, and if you think both are irrelevant, then you are an atheist.
OH, SO YOUR CHRISTIAN FRIEND IS GAY AND PROUD? HE MUST NOT READ THE BIBLE THEN, HUH? LEVITICUS 18:22 STATES, "YOU SHALL NOT LIE WITH A MALE AS WITH A WOMAN; IT IS AN ABOMINATION."