What you are seeing is called “reprobation”; it is spiritual psychopathy/sociopathy and the clinical description is found in Rom.1:18-32 and II Tim. 3:1-5.
The only way to protect our children and ourselves is to avoid those who manifest this pathology.
You are absolutely right about that. Please pray for the many who are forced by circumstances to be in reprobate. contact with these reprobates.