What's the noun for desacralizing? Here's the word you're looking for.
desacralization
(religion) The reverse of sacralization, and occurs when a formerly dedicated religious structure such as a church or religious school is given over for another purpose outside of the particular religious organization which dedicated it for a sacred purpose.
“The desacralization resulting from exaggerated secularization has resulted in a value vacuum which is being filled by a utilitarian ethic.”
“The historical desacralization of formerly powerful religious imagery also is suggested by the motif of the nursing woman who sits beneath the epitaph.”
“The religious aspect is now largely missing in the institution of marriage: this is often referred to as the desacralization of marriage.”
