What’s the problem? They’re no more genetically related than identical twins. In fact, they’re less related, since they’re being carried to term by a different mother, which means they have different mitochondrial DNA.
I’ve wondered the same thing for some time. Having the same genes does not make two people the same, and people who know identical twins know this better than most. I have three sisters, two of whom are identical twins (and one of those has a blog!). I can tell you that they are very different people.
I can see issues with genetic engineering, but I’m not particularly freaked out by them. I note that Allahpundit (who also isn’t bothered) is an athiest, and I’m an agnostic. Is this a religious thing?