It's a hit and run accident.

Victim high on drugs (mentioned in the courts)

Victim bang into Yew somewhere at the toll. Then, victim allegedly showed middle finger at Yew after banging into him.

Victim ran off. Yew gave chase.

Yew managed to catch up with victim. Both argued and victim refused to admit fault for banging him, hence the argument.

Both get back to their car.

Then victim ran to Yew holding a baseball bat.

What would you do given the above scenario?
I think you have been misled by the picture. See how easy it is to frame someone by simply cropping a picture from a video without context. In the video, he was merely retelling the sequence of events to the cameraman.

If you look at the sequence of events. it doesn't look like to assert dominance. The other guy seems very threatening.

I felt Yew was unlucky to have met the other guy.

(The other guy was high on drugs, banged into his car and ran off, showed middle finger to him, argued with him, and then attempted to attack him with a baseball bat.

Exception 4—Culpable homicide is not murder if it is committed without
premeditation in a sudden fight in the heat of passion upon a sudden quarrel, and
without the offender having taken undue advantage or acted in a cruel or unusual
manner.

(e) A attempts to pull Z’s nose. Z, in the exercise of the right of private defence,
lays hold of A to prevent him from doing so. A is moved to sudden and
violent passion in consequence, and kills Z. This is murder, in as much as
the provocation was given by a thing done in the exercise of the right of
private defence.