Again, you are predefining religion and politics as inherently separate spheres of life. Islam doesn’t do that. My whole point is that a religion does not cease to be such because it also incorporates other aspects of life.
That Islam “isn’t like other religions,” which is not necessarily even true, is irrelevant even if it is.
“Not like other religions.” Early Mormonism was a pretty comprehensive way of life. So is the Amish faith today. Not much in their lives is “outside religion.” Jim Jones and his cult were a religion. Just a really negative one.
From a practical standpoint, defining Islam as legally “not a religion” would require empowering some government agency or court to define which groups qualify as religions. That would be a cure far worse than the disease of having to accept Islam as a religion under 1A.
Jim Jones was an atheists.