Parental Alienation is child abuse! The emotional and psychological damage is severe and can last a lifetime. Parental Alienation causes the child to have low self esteem, self hatred, lack of trust, depression, substance abuse and many other issues that they would not otherwise suffer.
Suddenly taking a 5 1/2 year olds involved, loving father, stepmom and 4 siblings that he loves out of his life is abuse. The abuse is not to one child but 5 innocent children as his siblings are just as affected by the alienation.
A parent that loves their child would never hurt them by cutting out their other loving parent.