Remember, only those call for peace who are at a weak position.
Taliban were being pounded hard in FATA, North Waziristan and a couple of other areas were their only strongholds left. Ops were underway there as well. If you halt ops according to their demands and talk, they will get a chance to regroup and will probably collapse the peace deal...so they get their chance to regroup...in short, humain phuddu bana dain gay...and we are obliging to them till now.
Yup, killing every other guy is according to Islam!!