Middle school teacher here.

Sorry to burst your bubble, but all major religions are covered along with the regions they are associated with. Common core standards at play, no conspiracy here. Part of learning about the world we live n, nothing more and nothing less. I personally work from these textbooks and can say that there is no preference or agenda....

Wait a few months and Christianity will be covered as well. Of course many of you are just looking for something, so carry on if you wish :)

Peace