Netitzat Even — Removing Sanctity or Creating a Pesul?

What is the nature of the prohibition against removing a stone from the Beit HaMikdash—is it the removal of the stone’s sanctity, or creating a deficiency in the Mikdash itself? A novel insight of the Rogatchover sheds light on the Rambam’s precise wording and the distinction between the Mizbe’ach, the Heichal, and the Azarah.לקוטי שיחות, חלק כט, תבוא ב, הערה 53