Deletion of Flags of ethnic groups

Comment: at least until the article's many contributors receive courtesy notifications as recommended by the fD|AfD procedure. From looking at Special:Whatlinkshere/Wikipedia:Articles for deletion/Flags of ethnic groups, this doesn't appear to have been done. The nominator's |original research concern is a valid one (who decides on official flags for unofficial groupings) but I think that's more of an editorial issue than a deletion issue
Stance: keep
Cited policy: Wikipedia:Attribution (WP:A||WP:OR)