The Goal of Da'wah and the Methodology of the Prophets in It

Question:
These are multiple questions. He says: What is your opinion on the following claims? That the goal of da'wah is establishing the caliphate and seeking kingship? The second is giving the pledge of allegiance to the leaders of secret groups.

Answer:
The purpose of da'wah is to purify worship for Allah and to establish tawhid (the oneness of Allah). Every messenger, the first thing he begins with, is saying to his people: The Prophet (peace and blessings be upon him) first called to tawhid. He remained in Makkah for thirteen years calling to tawhid. When he sent Mu'adh to Yemen, he said: "You will come to a people from the People of the Book, so let the first thing you call them to be . If they respond to that, then inform them that Allah has made obligatory upon them five prayers. If they respond to that, then inform them that Allah has made obligatory upon them a charity to be taken from their rich... This is the methodology of da'wah. What?
This is the methodology of da'wah that the prophets have outlined for us. The methodology of da'wah is not that we call to rule, we call to power, we call to the religion, to tawhid, first of all. This is what we call to. And we call to the community, and to obedience and listening. This is tawhid. Yes. And this is the call to Allah. And this is the Islamic ruling, the Islamic judgment. This is it. Yes.