Is the call of all the prophets to tawhid (the oneness of Allah)?

Question:
The questioner asks: Did the prophets (peace be upon them) call only to tawhid al-uluhiyyah (oneness of worship), or did they call to all types of tawhid?

Answer:
My brothers, tawhid al-rububiyyah (oneness of lordship) is not what requires a call. All nations acknowledge it. They all acknowledge tawhid al-rububiyyah by virtue of the fitrah (the innate natural disposition) with which Allah created them. No one denies tawhid al-rububiyyah except a stubborn one who denies it with his tongue but acknowledges it with his heart, like Pharaoh. Even Iblis acknowledges tawhid al-rububiyyah. He said, "My Lord." What is that? Iblis said, "My Lord." Iblis said, "My Lord, by what did You mislead me?"
Iblis acknowledges tawhid al-rububiyyah. Tawhid al-rububiyyah does not require a call because it is ingrained in the fitrah and is acknowledged. The only thing in which there was disagreement is tawhid al-uluhiyyah. Therefore, all the messengers call to tawhid al-uluhiyyah, for that is where the disagreement among the nations occurred. Every messenger said to his people, "O my people, worship Allah." He did not say, "Acknowledge lordship." Rather, he said, "Worship Allah," because they already acknowledged lordship, but they worshipped others alongside Allah. We must know this principle, because there are misleaders now who want to divert people from tawhid al-uluhiyyah and say that tawhid al-rububiyyah is sufficient. If tawhid al-rububiyyah were sufficient, the polytheists whom the Messenger of Allah (peace and blessings be upon him) fought would have been Muslims, and the Messenger would be fighting Muslims. Glory be to Allah. Yes.