Its a political ideology.
Sharia Law is the political aspect of Islam, which makes up quite a bit of it. I also view Islam as a religion, as far as false religions go. It reinterprets the god of both Christians and Jews as something more befitting desert nomads who were always out to steal each others’ mud holes. There were times that he slipped up and reverted back to Hubal worship, from which Islam derives a lot of its customs. Muslims just say he was possessed then, but got better. Yeah, sure. When were Isaiah or Elijah ever possessed by the devil?
Muhammed, I mean.