What is the ruling on one who commits major shirk (associating partners with Allah) while ignorant, even though he says, "There is no god but Allah"?

Question:
The questioner says: Is there scholarly consensus (ijma') that one who associates partners with Allah in major shirk is called a mushrik (one who associates partners with Allah) in this world, even if he is ignorant and says, "There is no god but Allah"?

Answer:
My brother, tawhid (the oneness of Allah) is among the apparent matters; it is not hidden such that one would be excused by ignorance. This is among the apparent matters. The Qur'an calls for the prohibition of shirk (associating partners with Allah), curses the mushrikin (those who associate partners with Allah), and warns them of the Fire. It is not hidden. Tawhid is not hidden, and shirk is not hidden; they are among the apparent matters regarding which warnings have come in the Book and the Sunnah, and by the consensus of the Ummah (the Muslim community). Yes.