I heard the shuls in the middle east were saved from destruction during WW2 because of there being careful not to speak in davening. I heard an interesting vort I cant remember from who.it says whoever speaks during davening is as if he murdered. how can this be?
see the link in the added comment in the OP
avoda is one of the 3 pillars holding up the world(avot perek 1 mishna 2)by talking u disturb davening/avoda and cause this pillar to crumble.