Sure, they're not as scary as the Third Reich or the USSR, but given how fast they've assimilated huge portions of Iraq and Syria with tactical brilliance illustrates that they're more than just a disorganized "mafia" as you say. We definitely need to be keeping an eye on them.
I'm not saying otherwise, nor am I calling them disorganised. I'm calling them out for what they are - thugs and criminals. Not a legitimate political entity.
Don't we treat them the same as Al-Qaida?
The media sure as shit isn't.