II Samuel 20:6 And David said to Abishai, Now shall Sheba the son of Bichri do us more harm than did Absalom: take thou thy lord’s servants, and pursue after him, lest he get him fenced cities, and escape us.
David did not fight to save his kingdom when Abaslom raised himself up but now he is quick to send his men to seek the head of Sheba. It is not clear why David would react differently on two different occasions. Obviously we will need to be careful not to draw a hard and fast conclusion when David does not defend his kingdom with Absalom. There must be times to stand and fight and other times when we should not defend ourselves. Both are tragedies and I do not presume to say what should be the way we handle an attack but we do need balance in what we do under these severe attacks.