His focus was not as much that redefining marriage will cause immediate violence or something, but to retain the familial structure in which children are reared by their parents as a foundational block of society. During last year’s World Day of Peace speech, he emphasized that we should “ensure that children receive one of the most precious of treasures: the presence of their parents.” To sever society from that pillar is to cause non-peace in hearts (not necessarily military peace, which is how I think many people naturally assume the word peace must be meant). In other words, if you think you’re going to find “peace” by accepting non-traditional marriage - you won’t. The other aspect of his speech is justice, and I think that is also affected because redefining marriage is an unjust affront to the truth.