Fred Clark, a Baptist Gen X blogger, doesn't just worry about how this kind of message from Christian institutions alienates gays and lesbians. He's afraid that eventually, it will alienate everybody. He writes:
Public statements like this exist only to take sides, draw lines and build walls. This letter serves no prophetic or pastoral purpose. But it is — unintentionally — useful and helpful for identifying the dead-enders determined to make exclusion and condemnation the hallmarks of their communities.
This pronouncement is an explicit “Unwelcome” sign hung on all of their churches.... [T]hat cramped inhospitality applies not just to the GLBT folks they’re demonizing here, but to “all Americans who dare to differ” with the letter’s signatories.
So in a sense what these signatories have just done is they have turned to nearly every American born since, say, Thriller came out*, pointed a long crooked finger and declared, “We don’t want your kind in our congregations.”