I told him that I didn't despise his son or feel any ill-will, but that God says such conduct is sinful. Although the Bible doesn't tell us John's manner, I think he was respectful but firm. If his rebuke had unduly antagonized Herod, the king would not have continued to respect and listen to John. Let's be kind toward those who live in sin, but let's always make it clear that God hates sin, and that there are serious consequences for those who don't repent. To sweeten the sin-soiled years.
True kindness warns and rescues.