I would not yet attribute that this was intentional (especially if the driver slowed quickly.)
The more likely scenario here is that the driver was distracted, did not realize that there was a cyclist in the lane - perhaps made worse by lanes narrowing - and slowed quickly and swerved to try to avoid the accident.
It seems especially unlikely that this was intentional when he turned himself in the next day.
Of course, yes it does happen that drivers try to scare or even harm cyclists for fun or because they believe that cars should be the only road users. But I don't think that's what happened in this case.
The more likely scenario here is that the driver was distracted, did not realize that there was a cyclist in the lane - perhaps made worse by lanes narrowing - and slowed quickly and swerved to try to avoid the accident.
It seems especially unlikely that this was intentional when he turned himself in the next day.
Of course, yes it does happen that drivers try to scare or even harm cyclists for fun or because they believe that cars should be the only road users. But I don't think that's what happened in this case.