"Before" the big bang is still entirely unknown and unimaginable, and mechanisms like cause and effect are almost certainly inapplicable.
Basically we have no idea, and saying "God did it" is Sunday School rhetoric, something for children.
In terms of time-lines yes, it's difficult to talk about orders of events before time itself existed as we know it right?
But the originator of creation, of the information needed for us to be having this conversation, it's a distinct and separate paradox to say that the 'laws of nature' were created by- those same laws
This is what I was brought up with as a child 'nature done it' or 'it just is'
This is how, as a young child, we view all intelligently designed objects, we don't deduce the architect that designed the house we live in, we just accept that it exists along with trees and clouds.
It takes a little more experience and analytical thinking to distinguish things that nature most likely did not produce.
And of course as adults we try to teach children this, in Sunday school or shop class