Oh dear. Here we go again!

"To say that believers invented God ,..."

No, Pete, people invented God and then people (not necessarily the same people) chose to believe in Him.

"Of course, if you can demonstrate a universe from nothing ..."

The scientific evidence, SO FAR, suggests the possibility of a universe from nothing (or something similar)but I'm sure that there's lots more theorising and evidence gathering to go. On the other hand, there's no evidence for the existence of a creator ... Of course, Pete, if you can demonstrate that a creator exists ...?