The ruling on calling to tawhid (the oneness of Allah) in the presence of doubts

Question:
Honorable Shaykh! Some of those who claim to be scholars say, "Do not call people to tawhid (the oneness of Allah); they are already monotheists, but teach them spiritual refinements." How do we respond to these people?

Answer:
They are monotheists, if Allah wills, but calling them to tawhid (the oneness of Allah) is a confirmation, and it is not obligatory to reinforce it, and because there are doubts, it is necessary to clarify them for them, because the monotheist is also in danger from doubts and from the callers to misguidance. So we protect them, we protect them. And is this tawhid (the oneness of Allah) greater than the tawhid (the oneness of Allah) of Khalil Ibrahim (peace be upon him)? Did he not say He feared for himself, he feared for himself. So how do we not warn these people of shirk (associating partners with Allah) and caution them against it, lest they be deceived by it or it be spread among them? Our Prophet Muhammad (peace and blessings be upon him) said, "O Turner of hearts, make my heart firm upon Your religion." He is the Messenger of Allah (peace and blessings be upon him), so no one is safe for himself, and no one certifies himself, saying, "I am a monotheist and I do not need an explanation of tawhid (the oneness of Allah)." You need it. It may be confused for you, a doubt may be presented to you, a malicious person may come to you, so you must protect yourself from these matters, and it has been made beautiful for you. Yes.