I think it's all very sad. Poor Meghan must be mortified by the behaviour of her step sister. It was she who arranged the photo shoot to try to show her father in a better light. Mr Markle values his privacy, and his daughter should have left things alone. The paparazzi are the people at fault here, for taking photos of him in the first place. He is just an ordinary man, going about his business. I don't get dressed up to go to the local shop, so why should he?
I take my hat off too him for deciding not to come to the wedding, but it is sad that he will not be able to walk his daughter down the aisle. It was one of my DF's proudest moments.
I agree with what others have said though, about the Royal Family and Royal protocol. Surely someone might have been sent out to brief the family on what to expect, and how to react to photographers and journalists.
I hope Prince Harry and Meghan have a wonderful day, and can put all the nonsense to one side.
I also wish them both health and happiness, and a long and happy, and fruitful marriage.