"Love the sinner, hate the sin" is wrongly attributed to Christ. That's part of the lukewarm, corrupted Christianity that many far too embrace. That aphorism (often used in a context when sodomites are discussed) actually is a variation of what Mohandas Gandhi, a non-believer in the divinity of Christ (and a Socialist), wrote: "Hate the sin and not the sinner".
Well, Jesus loved enough to seek to save people from their sins. Yes, there are behaviors that are harmful and self-destructive upon those who practice them, and honestly it is a Christian duty to encourage people not to practice certain behaviors, of which sodomy is one.