From our friend Greg Laughlin:
The time has come, indeed, it has long since come, for Christians to ask themselves how it has come to this. It has been a long, long trail.
A good place to start would be to read Justice O'Connor's concurrence in Lawrence and ask yourself what she's talking about.
See: http://www.law.cornell.edu/supct/html/02-102.ZC.html. For some help, see: http://en.wikipedia.org/wiki/Sodomy_laws_in_the_United_States#State_laws_prior_to_2003.
Then, read all of the opinions in Griswold v. Connecticut. See: http://www.law.cornell.edu/supct/html/historics/USSC_CR_0381_0479_ZO.html, the case on which Roe v. Wade and Lawrence v. Texas is based.
Ask yourself where such laws came from and how it came to be that an overwhelmingly Protestant nation enacted such laws.
Then purchase or borrow from a library "Birth Control in America: The Career of Margaret Sanger" by David M. Kennedy and, if you don't have time to read the whole book, read Chapter 6, "The Debate on Morality". See: http://www.amazon.com/Birth-Control-America-Margaret-History/dp/1597404276.
You'll see the debate then was just as intense as today, though the subject matter was different, but closely related.
Then read what Luther and our Protestant forebearers wrote. See: http://socrates58.blogspot.com/2004/02/why-did-god-kill-onan-luther-calvin.html. Note particularly what Luther wrote in his "Lectures on Genesis: Chapters 38-44".
Then read Matthew 7:1-5 and ask yourselves why we haven't been able to see clearly to remove this speck from the eyes of our brothers and sisters. Also ask yourself what you grandchildren and great-grandchildren will believe on today's subject based on how our beliefs have changed from what our grandparents and great-grandparents believed and practiced a century ago and for centuries before that.
He who has ears, let him hear.