[Humidston]

He was referring to Mecca, where, as I understand it, the Muslims think the Big Kahoona Mohamma-Momma caused a moon rock to crash into the earth. Thus, their pilgrimages to worship at the feet of their idol.

[muawiyah]

I thought they were under the impression they were paying homage to God at the site where Abraham built an altar to sacrifice (one of his sons ~ pick your own).

There is, in fact, in the middle of the Kaaba, an altar made up of fossilized wood. There's a moderate sized meteorite on top. It's not all that big.

I am unaware anyone has made a claim that this meteorite is from the Moon.

Sometimes people mistake the tent and it's curtains that sits atop the altar for the real thing, but that's just a protective covering.

As people pass the rock, set in silver I believe, they kiss it.