Quoting Alex Rode
God didn't create the other religions, I don't think. He created humans and gave them that responsibility, and some haven't handled it very well. Therefore, untrue religions are active.
Quoting Elliot M
Very good, but it is strange that God let Satan control us in this way, creating other humans. But other religions are a test for us, as most do persecute us(Please do not take what I say seriously as I am only 13 years old, and I am just saying what I think(I do agree with you very much though, and I think it is a very good reason)).