Rose’s girlfriend Tara Knaggs, 25, was also found guilty of assisting an offender.
In the early hours of 22 July, Rose had seen “movement” in playing fields behind his address and thought someone was trying to break into his house, the CPS said.
Having called friends to help search for the culprits, he spotted Mr Birchard and Mr George who had gone out on an e-bike to meet a friend at a pub.
Wrongly assuming they were responsible, Rose chased the pair through the town at speeds of over 60mph in 30mph areas, before crashing into them, the CPS added.
Mr Birchard died at the scene and Mr George died from his injuries later that day.
Following the crash, Rose dumped his car before returning home on foot and calling police to report the vehicle stolen, the CPS said.
He had previously pleaded guilty to one charge of perverting the course of justice in relation to this.
Rose then travelled to Birmingham Airport with Knaggs, who used her phone to book both of them one-way flights to Istanbul.