Why was Hannah revolted by clothes in the pile for the Jewish imates? What did this suggest about the origin of the clothes?

The clothes were worn and smelly. Hannah describes them as smelling like sweat...... and something she didn't even want to guess. From the text, we can infer they smelled like death.

Hannah took her turn at one of the tables and started to paw through the clothes. They were ragged and worn and smelled peculiar, with a lingering, dank odor, part old sweat and part something else Hannah did not even want to guess at. She hesitated.