Rom:5:19: For as by one man's disobedience many were made sinners, so by the obedience of one shall many be made righteous. Lk:3:38: Which was the son of Enos, which was the son of Seth, which was...
talk to him about it, make sure that he knows to not to take anything to heart no matter how true it may seem. also you can possibly switch schools or have him tell a teacher