The LGBT tunnel complex with vents under the bed of every LGBT person, leading to the LGBT rave "witches congress"?
The subway metro system where every station is a parish with an invisible astral synagogue?
The evil underground mall tunnel system where one can even find evil pagan Christmas merchandise?
The Patriot Movement UFO underground tunnels where aliens control the shadow governments?
The tunnel system of the little people?
Oh no, the ones for Satanist Jew sacrifices, why? Because 80s panic and nazism.
You know, there are many urban places where squatting occurs, sometimes for years. You'd find plenty of dirty mattresses there. Also, have you ever heard of bed bugs? That also stains them. Have you heard of menstruation? Even sweat and mold stains. "A stain! Jews! Sacrifices!" sounds like hastily jumping to unlikely conclusions for yet another opportunity for hate speech. Of course, law enforcement must also be into the great conspiracy if they don't massively arrest Jews. Bullshit is why.