You've been referring to alot of text books.
Nobody said he was 'entitled' or that anything would warrant the life-threatening manouevre, just putting words in people's mouths which is predictable.
I've witnessed first hand cyclists goad and provoke responses in motorists, a couple of times...
Not exactly a contest from the footage provided, he'll probably lose his job and his license and rightly so.
What the footage does not show is what happened prior to this which was undoubtedly some kind of intentional wind up that I have witnessed many cyclists do seeking to antagonise...