The Thomas Markle thing is really very odd.
What he did with the photoshoot is a bit naive and embarrassing, but it's not the crime of the century. I mean even dyed in the wool royals have committed similar faux pas in the past. Nowhere near worth being completely cut off by your daughter who you've always had a great relationship with.
Then the fact he had a heart attack and surgery and she still didn't fly over to see him, or indeed express any concern (in fact didn't he get angry voicemails from Harry while he was in hospital?) - the whole thing is really unbelievably callous and cold. It should have rung huge alarm bells for Harry, but he's too thick and totally infatuated by her to ever question her version of events.