Who do you think was in the wrong in this video?

WARNING: This video contains explicit language

These two bikers who were clearly driving over the speed limit, especially on such a windy road, had to suddenly radically decrease their speed as a BMW was parked in the middle of the road.

After all of this happens the biker shows his disregard for the BMW driver, but who do you think was in the wrong? The bikers? Or the BMW driver?

NOTE: This video contains explicit language.