Islamic scripture is quite clear on how one “negotiates” with non-believers. Since you are on a Mission From God, anything is permitted. That includes hudnah, a term usually translated in the West as “ceasefire” or “truce.” But Islam defines hudnah as a deception used against infidels (non-Moslems) that involves pretending to agree to a ceasefire or truce while preparing to continue attacking when the forces of Islam have regained their strength. The basic idea here is that Islam has been commanded by God to convert the world to Islam and there is no such a thing as coexistence (except when it is hudnah) nor any sense of fair dealing during this sacred endeavor. As a practical matter, Islamic countries ceased to be capable of conquering infidels over 500 years ago. At the same time Islamic conservatives consider this long inactivity as one long hudnah and any day now the Islamic armies will be on the march again.
Naturally, any good Islamic radical is not going to explain the reality of hudnah to infidels. Instead, in ancient hudnah fashion, they tell the infidels whatever it appears the infidels are willing to believe that will further the Islamic cause. Thus the Palestinians and Taliban are always bringing up peace talks, especially when Islamic combat capabilities are weak.