Ideological constructs are weaponized to sever the child from the other parent

Evidence

If one parent lives an ideology radically, this parent will often try to push the other parent completely out of the child’s life. The belief construct is often used as a weapon: “You have a very negative aura when you come back from visits to your mother. Until that dissipates, you can’t play with the other kids, they’ll get infected.” — Holm Gero Hümmler, Ulrike Schiesser, Fact and Prejudice, 517