He was at war, under such circumstances it is Islamically acceptable to do such things. Are you even aware what the early Muslims did to Dhul Khalasa?
We condemn violence against Muslim women, children and elderly because we most certainly wouldn't do the same to non Muslims. As for Masjids being destroyed, we certainly dislike it but don't call it a crime against humanity. We only find it odd how the same countries preach secularism but clearly don't practise it, and lament us for destroying places of worship of other faiths while they destroy ours. It's a bewildering form of hypocrisy.