Re: Sunni??
If you're not religous then you shouldn't comment on this topic. The only sect of islam that believes the Prophet Muhammad (pbuh) was not the last prophet are teh ahmadis and they have been declared non muslims. The rest of the sects do believe that the last prophet was the prophet Muhammad (pbuh). The dispute starts when we start talking about the Caliphs and the Imams that have followed.
Further, Ismailies have not been declared non-muslims by any of the Islamic countries.