Reference: Fataawa al-Lajnah ad-Daa.imah lil-Buhooth al-‘Ilmiyyah wal-Iftaa., – Volume 12, Page 244, Question 4 of Fatwa No.17324
Question: In the regions where there are shrines and the visiting of the graves, should we call them to tawheed only, or should we call them to tawheed and all the matters of religion, such as perfecting the salaah and other than that from the affairs of the religion?
And likewise, in cases where people are not doing actions of shirk but are committing some sins?
Response: It is obligatory to pay attention to the circumstances of the people whom one is inviting, when giving da’wah. So whoever has fallen into shirk, then one should start by forbidding shirk and enjoining tawheed; thereafter, enjoin all the other affairs of the religion. And whoever is free of shirk, but commits sins then he should be advised against this (committing sins), and be encouraged to repent.
And with Allaah lies all success and may Allaah send prayers and salutations upon our Prophet (sal-Allaahu ‘alayhi wa sallam) and his family and his companions.