And who told them this? Oh yeah - ISIS. SMH
ISIS has been claiming "credit" for just about every mass murder on American and European soil. By doing so, they trick people into believing that they are much larger, more powerful, and influential organization than they really are. Whether or not Paddock really was a convert to Islam and a believer in the jihad cause, I doubt that ISIS had anything to do with this (just as ISIS didn't mastermind the Orlando shooting).