I will let the article speak to you itself…
The suggestion sounds ludicrous: How could Christianity be responsible for the all-but-assured triumph of the movement for gay marriage? Aren’t the most committed Christians the most passionate defenders of traditional marriage and hence the most ardent opponents of permitting gay couples to marry?
From the overwhelming support for traditional marriage among white evangelical Protestants in the United States to the Catholic Church’s definition of homosexuality as “intrinsically disordered” to the black (Catholic and Anglican) Christians of Uganda who have recently worked to pass one of the most draconian anti-gay laws in the world, the answer would seem to be yes.
But things aren’t quite so simple. Just flip through the opening pages of everyone’s favorite work of secular prophesy — Alexis de Tocqueville’s Democracy in America (1835–1840) — and you’ll find a provocative alternative interpretation of Christianity’s indispensable role in the creation of the revolutionary ideal of human equality. The stunningly rapid rise of support for gay marriage over the past two decades is just the latest in a very long line of victories for that consummately Christian ideal — and it’s unlikely to be the last.