Mearat Hamachpela has a different din than other kvarim because of its unique structure. http://www.hebron.org.il/hebrew/articles.php?cat_id=8&limit=25 Ben Waxman wrote: > On several occasions I've seen cohanim in the Ma'ara; they were being > somech on the opinion that qivrei tzaddiqim are not m'tahmei. >