Only one of which --- SOuth Africa --- has a replacement fertility rate. (Ours is way below: it's 1.89 as of 2011.) And all of which now have public schools and public health agencies teaching boys about the best methods of male-on-male penetration.
The fertiility rate doesn't depend on gay marriage, of course. It depends on the underlying value system of gay marriage: adult gratification via sterile sex.
This is what straight couples achieve via hormones, spaying, and the suction curette.
That's why the LGBT agenda is supported by straight voting constituencies. Straights have been practicing gay marriage for over 40 years.
Homosexual “marriage” is only a relatively small portion of the negative replacement rate. As you point out, far larger are such matters as abortion, contraception, etc. The white populations of North America and Europe, whether historically Catholic, Protestant, or Orthodox, are in decline relative to the overall national populations. Nature abhors a vacuum. The increasing Hispanic and Asian population in North America and the increasing Muslim and African population of Europe will inevitably, given some decades or maybe a century or so, outnumber European-Americans and Europeans. Pat Buchanan is and will be vindicated in his predictions, unfortunately.
One of the best posts I've ever read on FR. Winner.