Ok first- where on earth in the states are you living that 12 year old girls with babies is so common you could call it the norm??? i just moved here and i have to tell you, in Canada at least, a pregnant 12 year old would raise MORE than a few eyebrows!

Also, I don't buy any of that religious tripe- it's a justification for a crime that will cause long term damages to the CHILD involved. I don't care if she 'agreed'- she's a child. she cannot agree or give consent, she can't POSSIBLY understand the full ramifications of what she's doing.
Furthermore, do you really think she could make a decision or her own? NO. there would be pressures from all sorts of authority figures that would remove any chance of her making a logical and rational decision.
Regardless of the laws or customs of that country or community, the International rights of the child and human decency do apply, and this is just wrong.