Can a Muslim involved in Major Sins do Dawah?
الحمد لله رب العالمين والصلوة والسلام على نبينا محمد وعلى اله واصحابه اجمعين
To begin with, a Muslim should sincerely strive to save himself from the Hell-Fire, as Allah says in the Qur'an in chapter 66, verse 6, the meaning of which can be translated as
O You who believe! ward off from yourselves and Your families a Fire (Hell) whose fuel is men and stones, over which are (appointed) angels stern (and) severe, who disobey not, (from executing) the commands they receive from Allah, but do that which they are commanded.
It is an accepted fact that the character of a daee (one who calls people to Allah) plays an important role in his Dawah. We also know, none of us is free from Major Sins, but for a few blessed ones. Many of us indulge in major sins such as backbiting, slandering, etc. Purification of the Nafs (soul) is an ongoing process, that every Muslim should be involved in all the time. So if it was said that those involved in Major Sins should stay away from Dawah, there would be only a handful of people calling towards Allah.
The answer to this question has multiple dimensions.
Firstly, any Muslim who is keen on doing Dawah should note that Allah describes the daee (one who calls people to Allah) as a doer of good deeds, when He says in the Qur'an in chapter 41, verse 33, the meaning of which can be translated as
And who is better in speech than He who [says: "My Lord is Allah (believes in his Oneness)," and Then stands Straight (acts upon his Order), and] invites (men) to Allah's (Islâmic Monotheism), and does righteous deeds, and says: "I am one of the Muslims".
- Secondly, a person who is involved in Major Sins other than Shirk (associating partners or setting up equals to Allah), is eligible to call people to the worship of Allah alone. If he gets such an opportunity, he should do so.
- Thirdly, if a person is popular amongst the society for his evil acts, he should NOT be projected by us as a role model or an example to the non-Muslims. However, as was mentioned above, if this person gets an opportunity to do Dawah, we will NOT prevent him from doing it, since we do not know at whose hands Allah guide people to Islam.
وصلى الله على نبينا محمد وعلى اله واصحابه اجمعين و الحمد لله رب العالمين