Simple Christians do not call others “mentally ill”
We've heard “simple Christian” rhetoric before, however ingratiating and presumptuous that might be, and that is dead faith, as opposed to living faith, the “simple” of whatever is what it is
Matthew 5:22 … but I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Raca, shall be in danger of the council: but whosoever shall say, Thou fool, shall be in danger of hell fire.
An Examination of the Impact of Clergy-Involved Mental Health Activities for Their Congregants on Clergy Life Satisfaction, Happiness, and Perceptions of Having a Life Close to Ideal in the USA - PMC
Clergy play a crucial role in supporting the mental health of their congregants, but the impact on their own well-being is understudied. A review of 2019–2020 data from 636 U.S. religious leaders using generalized estimating equations analysis found…

Why did Jesus warn against saying the word “raca” in Matthew 5:22?
Jesus warned that the use of such a word to describe someone was tantamount to murder and deserving of the severest punishment of the law.

Matthew 5:22 is the only passage in the Bible where the term raca is used. Raca comes from the Aramaic term reqa. It was a derogatory expression meaning “empty-headed,” insinuating a person’s stupidity or inferiority. It was an offensive name used to show utter contempt for another person. Jesus warned that the use of such a word to describe someone was tantamount to murder and deserving of the severest punishment of the law.
Raca, Fool, Mentally Ill, Insane, it's all in church now, the antichrist, the district of damnation and perdition of souls where people calling themselves Christians call others mentally ill.

