This quote looks like it should come from The Onion, but unfortunately, it’s just our President speaking stupidly.
Nellemann estimates that taxation has quickly become "the largest share of ISIL's income, both through taxation schemes of the local populous," various mafia-like schemes forcing payment with the threat of violence, as well as human trafficking. The expert suggested that "in 2015, [the smuggling] business is likely going to exceed a total of $2 billion, of which the Islamic State will slowly increase their share."
In its online English magazine, Dabiq, ISIS lays out its justification for its brutality against the Yazidis on religious grounds:
"Enslaving the families of the kuffar [unbelievers] and taking their women as concubines is a firmly established aspect of the Shariah [Islamic law] that if anyone were to deny or mock, he would be denying or mocking the verses of the Qur'an and the narrations of the Prophet."
As our president says silly things about the climate and terrorism, these women know first hand that it is an evil ideology, not climate that has created these rape farms and mass graves.