The pattern weaves human lives, not the "lives" of brick and mortar. I was thinking it was a loop for those lives in that area, a bubble of evil. With the DO making the pattern a mess, the Pattern shifted, and the threads of those people in that village were looped around and choked. The thread goes round and round, and they can't die.

Like:
Normal Life..........loop.
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That loop is there, and pretend that the bottom is part of the thread. It goes in a circular motion. It is akin to a snag. Think of a roller coaster. At first, it is smooth, and straight. Then, construction people (DO) make the roller coaster go loopy. Then, the DO messing with the pattern makes it shift slightly, making the rails on the loop at the bottom attach, making one go in circles.

I don't know if I'm clear or not...