Funny how autodailers were illegal when...
But that is exactly what the judge is pointing out. The judge is quite correct here, it is a simple matter and the law is invalid on its face.
If they banned ALL unsolicited autodialers -- which many states do -- then it is constitutional. Prohibiting the activity for everyone is proper.
By banning ONLY political autodialers it becomes a limitation on a specific type of speech. Limiting only a group of people or a specific type of speech is generally improper.