Limiting the study of creed to the issue of ruling by other than what Allah has revealed

Question:
He says: I testify to Allah regarding your love for Him. What is your opinion of the one who says that in this age, the study of creed must be limited to the issue of ruling by other than what Allah has revealed and secularism, because that is what is prevalent in this age? He cites the call of Shaykh Muhammad ibn 'Abd al-Wahhab as being specifically for the oneness of worship (tawhid al-uluhiyyah), because the association of partners with Allah in worship (shirk al-uluhiyyah) was prevalent in his time.

Answer:
It falls within the oneness of worship (tawhid al-uluhiyyah). Making the Shari'ah the authority is worship of Allah and preserves the oneness of worship, so it is included. It is not that it is the entirety of the oneness of Allah, but it is a part of it. The greatest thing occurring now is shirk (associating partners with Allah). Why does he focus on denying ruling by other than what Allah has revealed and forget the grave-worshippers, the worship of other than Allah, the worship of shrines and rockets? He does not forget this and leave it aside, but focuses on ruling by what was revealed. Even if he rules by the Shari'ah but does not prevent shirk, this will not benefit him. Yes.