Why do christians say Jesus condemned the homosexuality?

if Jesus never said one word about the topic, even he supported the straight marriage but also Jesus said to love your enemies, to love one another even if Jesus is God he won't changed his love but Paul did in his letter to corinthians by saying this "Know ye not that the unrighteous shall not inherit the kingdom of God? Be not deceived: neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind, Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God."