What happens when Boko Haran and ISIS start working together? It’s not just Nigerians that are letting the cancer spread.
Generally, every moslem in any non-moslem country should be killed. They are a plague and are at best sleeper terrorists. ISIS is not Nigeria's problem however. Nigeria needs to kill their own moslems and then prevent any others from coming in.
(And yes we should be doing the same exact thing here in the USA. Islam is a plague and is incompatible with our form of government. Those who wish to practise it need to either suicide or go elsewhere. (since the moslem scriptures command them to lie if they can gain advantage by it, no moslem's conversion can be trusted))