We are going to reduce Raqqa to a pile of rubble anyway ! We either do it slowly and let them regroup and reform as is happening or we do it quickly and take away the ability for them to adapt to the attack.
As we speak they are planning the next 'Paris' -the next airliner -I think people are in a dream if they think they are going to go away by tiny pin prick attacks.
As for morals - let the combatants wear a uniform and fight according to rules or understand that everyone in Raqqa including children is a potential suicide bomber - every doctor that left these shores is patching up ISIS fighters -we really need to grasp that we are never going to be on the same page with morals .