From The Daily Express:
The rooftop execution is the latest in a string of public killings, which are seen as a trademark of the savage jihadis.
It is the terror group’s preferred method of murder for the men they suspect of being gay, an ‘offence’ which is punishable by death.
The warped justifications for the murders say they can be carried out on the grounds of religion – as are the rapes of ‘non believers’, including Yazidi girls.