Wait. Apparently, this dude has been inactive for a while. The book was last made in 2019.
He probably saw all the hate he was getting and left. Once you've made a name for yourself here, it sticks with you unless you make a new secret account and act different and try and improve.
This was probably some 13 at the time kid who didn't really know how and why it was offensive. Still, would be best to report the book.
Hopefully, wherever this kid is, he changed his mind and got educated.