There is much Roman Catholicism that is not in the Bible. It is called Tradition. Muhammed is recognized as a great prophet of the God of Abraham (Allah) in Tradition.
Dare you to cite any legit authority to the contrary. YOU CAN'T BECAUSE YOU ARE UNEDUCATED, and have no idea what authority is. Heck, you were so stupid you couldn't get into junior college and were doomed to 20+ years as a grunt.
The pagan Arabs worshipped the Moon-god Allah by praying toward Mecca several times a day; making a pilgrimage to Mecca; running around the temple of the Moon-god called the Kabah; kissing the black stone; killing an animal in sacrifice to the Moon-god; throwing stones at the devil; fasting for the month which begins and ends with the crescent moon; giving alms to the poor, etc.,
The Muslim's claim that Allah is the God of the Bible and that Islam arose from the religion of the prophets and apostles is refuted by solid, overwhelming archeological evidence. Islam is nothing more than a revival of the ancient Moon-god cult. It has taken the symbols, the rites, the ceremonies, and even the name of its god from the ancient pagan religion of the Moon-god. As such, it is sheer idolatry and must be rejected by all those who follow the Torah and Gospel.
The religion of ancient Israel was based on revelation; the Old Testament says that God appeared in diverse places and spoke to the Patriarchs; there they raised altars of undressed stones, called Beth-el—or House of God. Man's sensual imagination soon led him "to collect his gods in the dust and fashion them as he pleased," imagining that God resided in these Stones. Thus it became Beth-aven or House of Vanity. Beth-el abounded in Chaldea, Asia, Egypt, Africa, Greece, in remote parts of Europe, among the Druids, Gauls, and Celto-Scythians, and in North and South America.
In the Hebrew language, stones fallen from the sky are called Bethel (Heb. "House of God"). After dreaming of a ladder reaching to heaven, Jacob called his stone pillow a Bethel-stone (Genesis 28:10-22).
"The Pagans imitated the Beth-el of Jacob and consecrated them with oil and blood, making them gods, calling them Betyles (betylus, baetyl, betyles). In classical antiquity a stone, either natural or artificially shaped, venerated as of divine origin, or as a symbol of divinity. There were a number of these sacred stones in Greece, the most famous being on the omphalos at Delphi. Likewise there were the so-called animated or oracular stones. "Strabo, Pliny, Helancius (Hellanicus) or Beth-al-Jupiter, Cybele, Venus, Mithras). The greater part of the natural Betyles were the black meteorites or fire-balls fallen from the heavens and regarded by the Sabeists as heavenly divinities. These meteorites were the Cabiri, and the Pelasgi—whose most noted worshippers were wandering or dispersed men" (The Trail of the Serpent, by Inquire Within, Boswell Publishing Co., Limited, London (1936) p. 10).
Meteorites-cults are common in Greco-Roman civilizations. According to the religious historian Mircea Eliade, the Temple of Artemis (Diana) at Ephesus contained a squat statue of the mother-goddess, carved from a meteorite that fell from Jupiter (Acts 19:26-35). The Palladium of Troy and the conic black stone or (Baetyl) of Elagabal in Emesa, Syria, are believed to be of meteoric origin. Likewise, the Phrygian mother goddess Cybele worshipped in Pessinus (later Rome) was a stone; doubtless a meteorite. A further example is the meteorite of Pessinunt in Phrygia, which was worshipped as "the needle of Cybele," brought to Rome in a powerful procession after the Punic war on advice from the Delphic oracle; there the meteorite was worshipped as a fertility goddess for further 500 years.