Wouldn't it be easier to just block IS from the internet instead of bombing everything, analysing meta data ( twitter, telegram, Facebook, ...) And stop them promoting themselves.

They will probably also loose some smart people because of this( it people, marketing,... ) and politicians can stop using it as an excuse for blocking encryption / spying on civilian.

They will probably have so much internal problems ( running a state without internet / communication should be very hard), that we won't hear much of them for a couple of months.

It could also become easier for their enemies for combatting IS if they have a 'supported' alternative