Below is the Catholic Church's stance on Polygamy:
The Catechism forbids polygamy as a grave offense against marriage. Polygamy is not in accord with the moral law and is a grave offense against the dignity of marriage.
-- Whose moral law? The self-righteousness of humans? Or Jesus' Holy Law he gave through Moses, which clearly allows polygamy. Therefore, Jesus (the Creator) would be condemned by the Catholic Church for his own Holy Law he gave to Moses, which Paul calls Holy and Good.
The Catechism forbids polygamy as a grave offense against marriage. Polygamy is not in accord with the moral law and is a grave offense against the dignity of marriage.
-- Whose moral law? The self-righteousness of humans? Or Jesus' Holy Law he gave through Moses, which clearly allows polygamy. Therefore, Jesus (the Creator) would be condemned by the Catholic Church for his own Holy Law he gave to Moses, which Paul calls Holy and Good.