I wouldn’t bother Richard.
Fred always thinks the Thais are against him and thinks he knows everything even though he is effectively illiterate and can’t understand anything but a basic sentence. He makes up what he imagines they are saying.
He claims in this incident that the Thais were in the wrong but it is possible since he is an American that he just got mixed up what side of the road he was supposed to be on, didn’t understand how he was wrong because couldn’t understand what they were telling him and now feels like a victim.
Quite possible something similar with this incident. The American is sure acting with the family that he knows he was in the wrong.
He might might have been wearing dark tinted shades, with a dark tinted helmet and not have seen the poor lady.