You said....”Mocking a prayer rug is disrespectful.”....
Not in the least. It’s a rug for crying out loud.
Just stop. Just stop pretending and trying to diminish the slur.
The poster was comparing a prayer rug in a mosque with a floor rug being hung up and beaten to clean it. Their verbatim question was, "Don’t you have a mosque to get to, or a rug to beat?"