Hiya Dave,
 
That was an interesting message you posted. First off, our Lord Jesus Christ, the Living Word of God, is the Judge of all. His Word has been given us to reveal Him and the things which He wants His people to know. A man's interpretation of the Word cannot sit as Judge. Of course we use the Word to help us discern good and evil, but our individual consciences end up being our final arbiter (for good or ill) until the Lord returns.
 
That being said, I believe you make a crucial error when you discuss the beast of Revelation 17 upon which Mystery Babylon sits. This beast is a person, not an empire. It is the same beast we are introduced to in Rev. 13. We know it is a man, because Rev. 13:18 tells us so.
 
The seven heads of the beast represent kings. These Kings are easily identified if one uses Nebuchadnezzar's dream image from Daniel 2 as a guide. 1) is Babylon; 2) Medo-Persia; 3) Macedonian Greece; 4) Ptolemaic Egypt; 5) Seleucid Near East--all of which had fallen by the time John was writing. 6) The Western Roman Empire was the kingdom that "was" as John wrote. 7) The Eastern Roman Empire--Byzantium--was the kingdom which was to come, and we know it continued "for a short space" (till 788 AD). The iron legs of the image thus represent Rome in its eastern and western aspects.
 
The Beast will be an eighth king, "of the seven," meaning he arises out of the imperial morass of which Rome is a progenitor. He will reign over the 10 kings represented by the feet and toes of the image, made of iron mingled with clay. The iron is the iron of Rome--the clay, humanity, possibly democracy?
 
I cannot believe that the scripture points to anything of a Moslem nature.
 
Your brother in Christ,
Matt in Hayward, CA