What the Pope says concerning the fabric of society is certainly true, and I'm glad that he said it, but I am a little disappointed that he didn't also say that homosexual unions cast aspersions on the image of God by essentially calling Him a liar.
God didn't create marriage between a man and a woman only for the sake of society, but also, and more importantly, to show to all creation an aspect of His own character.
We tamper with that at our own peril.