It’s being claimed by right wing sources that ISIS are teaching, ‘Forced sex ISN’T rape and they should be thankful’ – ISIS propaganda uses Koran to justify sex crimes,”
Let’s be absolutely clear here, forced sex (rape) is not allowed in Islam. Here are the views of Muslim scholars on rape:
And here is a piece on how rape of slaves is not allowed either:
Having said that, I’m not sure if these reports of ISIS members claiming such things are true. What is clear is that Islam does not allow rape.