>>89076293Again, the pictured anon confused Thawne's backstory from "The Return of Barry Allen" with his later backstory.
After "The Return of Barry Allen" Thawne lost all memory, except for unexplained hate for the Flash, his former idol. It actually ties into his pre-crisis backstory (even though its post-crisis itself).
He killed Barry's mother and turned his young years to shit AFTER he was resurrected by the White Entity. It's a relatively new story, described in "The Reverse-Flash: Rebirth" and "Flashpoint: Reverse Flash". There, his reasons for hating Allen are twofold:
a) His resurrected self remembered the pre-Crisis timeline.
b) His "altered past" self tried to become the Flash of the 25th century, messed up, and was stopped by Barry in "Flashpoint: Reverse Flash".