They don't want peace and do want to have Israel removed off 'their' land and out of their sight. They prove the validity of this perception by not offering to give anything tangible in return for what they want. The talk about 'land for peace' is a sham because the Arabs have proven that they can't 'give' peace even if they want to, which they don't. Wherever there is any semlance of 'peace' it's because Israel enforce it and not because the Arabs' goodwill.
CNN Turk: Turkish planes hit PKK targets in southeastern Turkey, northern Iraq (Reuters)
from the article: Who's afraid of renewing the peace process?