Prager does a good job of presenting some of the downstream effects and unintended consequences of redefining marriage — things that don’t immediately come to mind. It is quite disturbing. The European countries that now allow gay marriage provide provide something of a test of his predictions. Do they present gay marriage as just another choice on par with hetero marriage in their public school text books? Do their wedding ring sellers show his & his and her & her rings in their advertising? Would be interesting to hear what FReepers who travel to Europe (I think these are mostly Scandinavian countries) have seen.
For anyone interested, here's a fairly current listing of same sex marriage laws in Europe European Marriage Laws