What is to be done with someone who casts doubt upon or ridicules the claim of belonging to the Household of the Prophet (Ahl al-Bayt), even while acknowledging that true affiliation is through righteous deeds?

The questioner is congratulated on embracing Islam and taking pride in it. We ask Allah to make him and all believers among the Awliya' (devoted servants/supporters) of the Prophet, peace and blessings be upon him. The noble Hadith (definition) is recalled: "Indeed, the family of so-and-so are not my Awliya'; my Wali (protector/supporter) is Allah and the righteous believers." Emphasis is placed on not denying anyone's lineage without clear proof, and that people are to be believed regarding their lineages.