Whybrow, 46, has now been sentenced to life imprisonment with a minimum term of 24 years.
He and Raish, 50, began arguing about the main entrance door to the flats being kept open.
Raish told his wife that Whybrow had tried to attack him as he left his home.
Raish called his friend and the two met before returning to the flats, where they saw Whybrow.
A fight broke out between the men, before Whybrow went to his kitchen window and grabbed a knife from inside.
He began to shout “I will kill you” before trying to attack Raish’s friend.
CCTV showed Whybrow turning his attention to Raish and stabbing him multiple times.
He continued even after the victim fell to the floor and tried to defend himself with a steering lock he had picked up.
A teenage boy was also hurt by Whybrow as he attempted to protect Raish.
Emergency services were called and neighbours went to help Raish and also fend off Whybrow.
Raish was treated by paramedics from the London Ambulance Service and London’s Air Ambulance before being taken to hospital.
The teenage boy was also taken to hospital, where his injuries were assessed as neither life-threatening nor life-changing.
Detective Chief Inspector Samantha Townsend, from the Met’s Specialist Crime Unit, said: “My thoughts remain with the victim’s family at this difficult time.
“I hope the sentencing brings a small measure of peace and justice to them.”
