I have a better question. Why are FReepers more upset with polygamy on this thread than abortion?
Lots of reasons. They vary.
For many -- even me -- we've become desensitized to the plight of the pre-born. Just as Jesus said, "the poor will always with you," we think "abortion will always be with us."
We fail to think in terms of each pre-born being our neighbor...to us, THEY constitute an impersonal "issue."
Polygamy, with the advent of same-sex unions, is no longer simply a "historical" "issue"...but will become one of the next legalities our country embraces. So whereas too many of us pro-lifers have essentially given up treating abortion as a "hot-button issue," alternatives to one-man, one-woman marriage has become the NEW hot-button issue.
Now I am not agreeing with the position that we are to be more provoked by polygamy than abortion...merely explaining among the many reasons why.
Another reason that could be in play is that the overwhelming majority of FREEPERs are at least worldview-wise pro-life...that doesn't mean they DO things on behalf of the pre-born...but it does mean they don't see themselves as needing to be convinced to BE pro-life.
To them, many abortion discussions are like, "Why do we need to discuss a matter we all in the choir agree upon?"
On the other hand, I've had literally DOZENS and DOZENS of Freepers since 2007 -- mormons and otherwise -- who have mindset-wise considered polygamy as Biblically sanctionable and argue in favor of it.
So just as in our newspapers & TV news, it's the "hot-button" issues where side A is vs. Side B that gets more attention.