Patents in mobile have always been based on MAD (Mutually assured destruction). The whole point of FRAND is a recognition of that and attempt to defuse it.
When Apple stepped up and started suing for the few patents they held (and no intent to fairly license under FRAND like terms) they violated the MAD agreement and essentially made the FRAND patent pools worthless. This war will only continue to escalate until either the MAD balance is restored or everyone is out of business or all the patents are invalidated. Given the size of patent pools involved I believe in the long run Apple is at a serious disadvantage unless they can get MS to share the Nokia patents with them.