I seriously don't understand how a pro-life person can actually support rape/incest exceptions as anything other than a compromise.
Forcing a woman who has been raped to give birth seems evil, no? And, mutant babies, not a good idea, no?
For a pro-life person, you'd be literally punishing the child for the sins of their father. I'm pretty sure western law has rendered that mode of thinking quite obsolete, and for good reason. Killing them would be far more evil than forcing the mother to endure some possible temporary trauma.
As I said, this is provided you're a pro-life person who believes an unborn child is a person. If you don't believe that, then it would seem harsh, yes. If you do, then your assertion seems even moreso.