Excuse me? Jack Schaap married Jack Hyles' daughter many years ago. You want the man to publicly attack his father-in-law?
Matthew 10:35-37 35 "For I came to SET A MAN AGAINST HIS FATHER, AND A DAUGHTER AGAINST HER MOTHER, AND A DAUGHTER-IN-LAW AGAINST HER MOTHER-IN-LAW; 36 and A MAN'S ENEMIES WILL BE THE MEMBERS OF HIS HOUSEHOLD. 37 "He who loves father or mother more than Me is not worthy of Me; and he who loves son or daughter more than Me is not worthy of Me.
Mark 10:29-30 29 Jesus said, "Truly I say to you, there is no one who has left house or brothers or sisters or mother or father or children or farms, for My sake and for the gospel's sake, 30 but that he will receive a hundred times as much now in the present age, houses and brothers and sisters and mothers and children and farms, along with persecutions; and in the age to come, eternal life.
Luke 14:26 26 "If anyone comes to Me, and does not hate his own father and mother and wife and children and brothers and sisters, yes, and even his own life, he cannot be My disciple.
IN a nutshell, yes, for the love of God and his truth Jack Schaap should have privately confronted his father-in-law, and then publicly dealt with it by separation. Christ was clear that truth comes before family relationships. We should expect no less.