Hi,
See how humble the muslim victor is, though he is power position he still offer equitable peace, to avoid loss of human life and you are trying to compare this with arrogance of persian king, who knowingly send out his people to get killed to maintain his arrogance. Had he been an intelligent ruler he would have made peace and avoid bloodshed and saved his people from disgrace, today christian armies are occupying muslim land in Iraq, killing innocent muslims in name of colletral damage, compare then and now, compare when Saladin entered Juresalum to when Christian entered the city and killed Hundered and thousands of Muslims and muslim blood flowed freely in the streets of the Holy city.
Which history do you read.