The research is becoming known. There was no Mohammed, the Koran was developed over 100 years after he supposedly lived, and Mecca was never historically mentioned until at least the same time frame. It just doesn’t add up. See Ffander Films on youtube for numerous lectures on the subject.
The name mohammad can mean messenger. According to some historians of religion like Christoph Luxenberg (His book “The Syro-Aramaic Reading of the Koran: A Contribution to the Decoding of the Language of the Koran”) the Koran is a compilation of edited Syro-Aramaic very early Christian (possibly Gnostic Christian!) liturgical literature. Its reinterpreted by reading it in Arabic not its originally written language. (They use the same script in writing.) Somewhat analogous (but a bad one!) to a Spanish reading of text but it was originally written in an Italian dialect.
It’s believed that that the word mohammad i.e, messenger references Christ.
Islam is basically a license to enjoy a hedonistic life of stealing, raping, and killing, all under the guise that doing so helps you enjoy an eternal hedonism in heaven. Muhammad (or whoever) told the men around him whatever lies were necessary to convince the men around him to steal for him and kill for him and bring him a bunch of sex slaves. Today's Muslim leaders still teach and benefit from that.
It's hard to teach people to turn to God and live holy lives. It's easier to trick people into thinking God wants you to do whatever you want with your thingy, to steal whatever you want, and be violent to whoever you feel like being violent to. That's why Muhammad's (or whoever's) teachings are so popular in the Middle East, and unfortunately as they migrate to the west.