Bitcoin is money, and money is just a tool. Money by itself has no morality and no sides.
If ISIS succeeds in whatever ISIS is doing it will not be because of the currency of their choice.
But to raise funds, they use Bitcoin.
Bitcoin will be in the limelight negatively... again.
since they are in control of most the oil wells in syria and iraq its been estimated they are making 1-3 million dollars a DAY selling oil on the black market
this revenue has NOTHING to do with bitcoin
if anyone in the west is stupid enough to send btc to an ISIS address they will probably get a visit from a swat team shortly after so i wouldnt worry about more FUD in the news