Proverbs 13:24
Whoever spares the rod hates their children,but the one who loves their children is careful to discipline them.

This counts as well for telling sinners that they are sinning.
If you DON'T tell a sinner he is sinning and rebuke him, you hate him.

Example:
A person knows a homosexual and tells him he is a sinner and needs to repent and can change with the help of God. Perhaps the homosexual de-friends the person.
Another person, doesn't tell him a word because he prefers to not risk losing a friend. (Saying nothing counts as encouragement as well).

Homosexual is a sin. Sin brings us to Hell. So who of these people truly loved the homosexual? Indeed it was the first person who loved him and the second person who hated him, caring more about his friendship than the more important eternal life of his "friend".

We(Christians) don't hate homosexuals. But you don't love them. Not REALLY.