Textual: Mormon sets up Abinadi's second mission by summarizing the social climate into which the Lord sent Abinadi. Abinadi was not only sought by the king, but was also sought by the people. In verse 11:29 Mormon makes sure that we understand that it is the people themselves who are first on the lookout for Abinadi to kill him. Of course Mormon also tells us that neither Noah nor his people repented, so we know that the judgements of God will surely come upon them. Into this climate of unrepentance and of a population seeking Abinadi's life comes Abinadi on his second mission from the Lord.
When Abinadi comes among the people he comes in disguise, and then appears to blow his cover by announcing his name. Why the disguise if he were to openly state his name? The answer is verse 11:29. Without the disguise Abinadi could not have come among them because he would have been killed as he entered the community. We learn from this that Abinidi has been outside the community for the space of two years, but would still be known and still hunted for his life. Whether or not Abinadi understood the personal martyrdom that awaited him, the Lord's purpose required that Abinadi go before Noah's court. To accomplish that, Abinadi had to survive long enough to be in a public place where he could both preach and call attention to himself. In such a public place, the people who might have killed him upon sight would now defer to the officials of the government, and Abinadi would be take before Noah. That audience before Noah was the true purpose of his mission. Coming in disguise got him to the point where he could be given over to the authorities and brought to confront Noah and his priests directly.