A male Jew is the direct patrilineal genetic offspring of King David, and he marries a non-Jewish woman. Then their son converts to Judaism. Could their son potentially be Moshiach? If not: why not? Is “Davidic lineage” a status just like Kohanim which is lost after intermarriage, never to be regained even if the progeny converts? If so, what are the sources for that?
If the answer is no, then in identifying a potential Moshiach one would have to prove that there isn’t even a single instance of intermarriage through the paternal line going back to King David. In other words: if a direct patrilineal descendant from King David marries a non-Jewish woman, and then their son converts and rejoins the Jewish people (which is not unheard of) then none of his direct patrilineal offspring could ever be considered to be a potential Moshiach. Over many generations this could mean a tremendous amount of people. I admittedly don’t know much about it, but are Jews really that sure that there were no such instances through their patrilineal lines? I guess families with Kohanim status might keep really strict genealogical records, but I imagine most Jews certainly don’t.
I do not intend to offend anyone or start any kind of trouble; I’m not even a Jew myself. So forgive me for my ignorance if you perceive it as such. I’m just curious as to how it works, considering so many Jews are sincerely expecting the arrival of Moshiach.