This is a very good article addressing the error of the popular and widespread euphemism that all men are children of God by creation.
Rachel Lu, Crisis Magazine: This last Sunday, we were treated to the Gospel reading in which Christ is baptized by St. John the Baptist. It’s a compelling passage, especially because it focuses our attention on the purpose and meaning of baptism. The rambling, confused homily that we received on this topic (from an earnest-seeming seminarian whom I don’t know at all) sparked a later debate in the Lu household on a common error in the Church today. Why are Christians constantly stressing their solidarity with the rest of the world by claiming that “we are all children of God”? Full article is here.