He is being coherent with his religion. If you put the life start on the conception, then the logical conclusion is YES, abortion is murder.
But there is a great consensus that before developing a certain level of nervous system, it can't be considered an independent conscience yet.
So the problem is not on woman's right, is on religious definitions versus society definition.
Actually IT IS FUCKING ARBITRARY. We as society decided that nervous system or any other factor is the border and that is it, it is a society choice. The conclusion about yes abortion or no abortion is derivate from this choice.