Thwy are bombing their relion praying places mosques so bombing church is not an interesting thing. I dont believe even they are believing any religion.
Not that simple. The ISIS has never targeted a Sunni place of worship ever since its creation. They have mostly targeted Yazidi, Christian and other non-Muslim places of worship, although they have rarely destroyed some Shiite mosques and shrines. It will be foolish to say that religion has no role to play in this.