There's almost nothing to debunk at pizzagate.com. It's all opinions. If they were to write as a simple of list of falsifiable items, I would take a crack at it. However, currently the way they having it would be a debate about meanings of certain facts.

However, they do have some stuff that is straight out wrong. Louis Bourgeois's art is not inspired by Jeffrey Dahmer.

For one she did a series of Arches of Hysteria in various shapes and poses and I believe you could show this series was conceived before the Dahmer case and she is explicitly clear what the inspiration for these is. For two, her work is simply not the same position as the Dahmer photo. The arms and legs are completely different.

The first arch she did, the body has no arms and no head and is far less arched. She did this as part of her Cells series which started in the 80's

Thirdly, the crime scene photos were not released at the time of Dahmer's trial, but year later. Which would mean her work was exhibited first.