It is not their salvation in the first place. Salvation belongs to God. Now let us look at the truth? Jesus died and buried and Rose from the dead. Jesus said that a person would trust in His finished work alone. The word Pisteou in the Koine Greek is the word Believe in the English. The emphasis on the pisteou and meaning. It is a verb and means to absolute trust and depend on completel. So real Christians have this Pisteou and others do not. So arguing with a pervert that mixes law and Grace. Galatians chapter . So keep your eyes on Jesus and trust what He did was good enough to save you.