Matthew 5:22
But I tell you that anyone who is angry with a brother or sister will be subject to judgment. Again, anyone who says to a brother or sister, ‘Raca,’ is answerable to the court. And anyone who says, ‘You fool!’ will be in danger of the fire of hell.
Raca means worthless. Fool in this usage means disregarding Gods word.
Is this fellow a brother in Christ? What has he professed? If he counsels that any man can go to heaven by any means other than Christ, he is diregarding Gods word and should be called on it.
Again, what has this man professed?
Again
We don’t know what this man has professed
Exactly why we should not call him a fool