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