They [the Franks] replied, ‘We will not swear. You just send us the 100,000 dinars you have collected, the prisoners and the Cross and we will free those of your men that we wish and leave those we choose until the rest of the money comes.’ People understood then that they meant treachery, that they would only release the army pages, the poor, the Kurds and those of no account, while detaining the emirs and the wealthy to demand ransoms from them.
Ibn al-Athir did not like Kurds, apparently.
From his chronicle, describing the negotiations for the release of the prisoners captured by the Franks when they took Acre in 1191.
Linky - 1 note