Firstly, do not refer to them as ISIS. Their name is: ad-Dawla al-Islāmiyya fi al-'Iraq wa-sh-Sham. Practice this a few times, if you can't remember it.@F117 might have an answer
Second, they do not need worldly or material pleasures, like friends and alliances. They are highly motivated warriors who practice Jihad in the name of Allah alone, against the secular thugs and spreaders of immorality (Nusra/FSA). This allows them to fight on multiple fronts simultaneously.
Insha'Allah, they will defeat the foreign mercenaries (Nusra/FSA) and then bring True Islam to the places it is badly needed: Saudi Arabia, and Jordan. Turkey will certainly not be spared.
Allah knows best.