Of course, warning people without love is not good. But just because a person warns others about the consequences of sin, doesn’t mean that they are not loving.
Jesus warned people, “Unless you repent, you will all likewise perish”. This was spoken to the general public, not to “harsh religious judgmental Pharisees”.
Paul warned both the church and the world about the kinds of lifestyles which will keep you out of the Kingdom. 1 Corinthians 6:9,10. Galatians 5:17-21. Paul reminded the Ephesian elders in Acts 20 how he did not cease to WARN them, night and day, with tears.
John warned in Revelation 21:8 about a whole list of classes of people who will be thrown into the Lake of Fire. Some popular grace teachers say, “You can’t make a doctrine based on the Book of Revelation”. But then again, John said that anyone who took away from the Book of Revelation, God will take away His part from the Book of Life. So that might not be a safe approach after all.
The writer to Hebrews warned people about deliberate continual sinning in Hebrews 10:26-39. Read it if you don’t know it.
Peter warned that the last state of people drawn back into sin would be worse than the first – and that it would have been better for them not to have ever known the way of righteousness.
Jude, the brother of Jesus, warned about those who pervert the gospel by turning the grace of God into lasciviousness.
James warned that faith without corresponding loving ACTIONS was dead and can’t save, and that pure and undefiled religion involved not only caring for the poor, but also keeping oneself unspotted from the world.
Were all these apostles and writers of Scripture unloving, graceless, harsh hypocrites for whom Jesus would have given his strongest words of condemnation?
All the warnings of the Old Testament prophets – were they given through the Spirit of God or through a harsh, unloving spirit?
All the Christian writers before 300 AD who constantly exhorted the church towards holiness – were they wrong too?
It is not loving to take people’s money for doing God’s work and let the same people go to hell without a warning, or with a false comfort that wouldn’t stand up to the teaching of Jesus Christ or the apostles.
This is not to say that all warnings are done in love. It is easy for a person to give warnings out of a bitter, twisted spirit and that doesn’t glorify God.
If we have our eyes opened to the truth about divine judgment, and we love people, we should seek to make it clear, in a gentle way if we can, that “there is a problem”.
But people who don’t have their eyes open to the reality of Eternal Judgment are blind leaders of the blind. The correct foundation mentioned in Hebrews 6:1-3 has not actually been laid yet in their life.