Simply, he could not accept that a"nobody", a stranger,
came to Gattaca, proving himself far superior to
him and everyone else.
At the end of the movie"Gattaca(1997)" Anton,
envious and full of evil, makes a last attempt to prove his supremacy in front of his brother.
Or as one of these"inferior" children put it in the movie Gattaca,"I will never understand what possessed
my mother to put her faith in God's hands, rather than her local geneticist.".