Question: why are eobard thawne and barry allen enemies?
Answer: Eobard and Barry: because Thawne wanted be The Flash of the future and instead he discovered he was destined to become the Reverse-Flash, so he embraced it and became the Reverse-Flash known as “Professor Zoom”. ... Thaddeus and Bart: Thawne was born as a “purified” clone of Bart, he was born to destroy Bart.