Lets look at that argument in a syllogism:
- The law of causality only applies to physical things in space and time.
- The creation of the universe did not occur in space-time (it was the creation of space-time).
- Therefore the law of causality does not apply to the creation of our universe.
This argument does not work because the first premise is false. In order to see why, lets put our inspector hat back on.
Notice that there is no physical relationship between the premises (1. and 2.) and the conclusion (3.) of the argument above (or any argument). Also notice that the premises are not objects in space-time. Yet there is a causal relationship between the premises and the conclusion. In other words true premises result in valid conclusions.
If the above argument were sound then no argument could be sound. How so? If the laws of causality only apply to physical things, then no argument would work because premises and arguments are not physical things. For any argument to work - including arguments against God - the law of causality must apply to the immaterial realm because the components of arguments are immaterial.