A family member argues that the New Testament doesn’t deal with the issue of homosexuality. To which passages can I refer him?

The following New Testament passages deal with homosexual acts:

• For this reason God gave them up to dishonorable passions. Their women exchanged natural relations for unnatural, and the men likewise gave up natural relations with women and were consumed with passion for one another, men committing shameless acts with men and receiving in their own persons the due penalty for their error. (Rom 1:26-27)
• Do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived; neither the immoral, nor idolaters, nor adulterers, nor homosexuals, nor thieves, nor the greedy, nor drunkards, nor revilers, nor robbers will inherit the kingdom of God. (1Cor 6:9-10)
• [T]he law is not laid down for the just but for the lawless and disobedient, for the ungodly and sinners, for the unholy and profane, for murderers of fathers and murderers of mothers, for manslayers, immoral persons, sodomites, kidnapers, liars, perjurers, and whatever else is contrary to sound doctrine. (1 Tm 1:9-10)
• [J]ust as Sodom and Gomorrah and the surrounding cities, which likewise acted immorally and indulged in unnatural lust, serve as an example by undergoing a punishment of eternal fire. (Jude 7)

But God’s displeasure with acting out on homosexuality is depicted as early as Genesis 19 in the Old Testament. Also see Leviticus 18:22 and 20:13.
—Jim Blackburn