The Ten Horns

[allodial]

FWIW, I think that the star represents the male energy and the crescent moon represents the female energy.

The male being represented by an inverted pentagram (Destructive). In Greek "mouni" means vagina. Vagina worship is known to exist. Looking at the coat of arms from a heraldric perspective, the upside down star represents the source of power for the two-horned entity or the like. The crescent can be used used to represent a "second son" for family lines in heraldry. In witchcraft it can be part of the symbol for the Goddess" or the "Horned God". It is also held to be a symbol for a "Moon God" which is said to have been worshiped since ancient times in Arabian lands.

If you're referring to mosques and Islamic flags, it predates Islam when pre-Islamic people (Arabs) worshiped a crescent moon god father of which many statuettes have been found throughout the Middle East. Mecca is where this god being supposedly resided. These pre-Islamists also worshiped a female sun goddess and several 'star' daughters as well as meteorites that would occasionally fall, one of which was incorporated into the Kabba around which modern Muslims worship. This is also probably why they follow a lunar based calendar and carry small swords shaped like crescent moons. Some say one of the names of this moon god was "Allah" but others argue that Allah just means "god". But it's quite likely Mohammed & his followers assimilated pagan traditions and beliefs with his new found faith.

There are actually "occultists" who regard the vagina to be a kind of "Holy of Holies".