There's a biblical view of having as many descendents as there are stars. An unattainable goal, but one which is promised in their religious fairytale. So to live up to that, anything that makes more is good in their mind.
I just find it more contradictory that many of those in the same group are also highly for capital punishment and have many allowances of killings, such as holy wars, than others. If you want to increase your numbers and killing babies is bad, then killing anybody at all is bad too, isn't it?
