I'm a hard core atheist but those kinds of sayings always bug me as just being semantic word play. They essentially equate a higher being's power with the ability to do something that is impossible simply based on the definitions of the words themselves.
Can god create a square that's a circle?
No?
Must not be a god then!
Just silly. There's endless valid arguments against the existence of gods without having to resort to linguistic trickery.
The joke is that he should just use snap. ;)
jk