There is the issue of…

There is the issue of Idh’aan (true assent) being a condition of faith, that is why Abu Talib and Hercules are not counted as Muslims, even though they had knowledge of Islam being true, while knowledge plus conviction is what is required. The case of the Najashi (RAA) for example is there, since he knew the truth and followed the message even if surreptitiously (which shows there can be further conditions for assent to be counted as true).