Respect, not Protocol. Protocol is what the British do, probably what we would do if our President died whilst holding the office.
Ireland/Northern Ireland/England will NEVER move on if people keep dragging up the past. Queen Elizabeth made amends for the atrocities carried out when her ancestors were in power, She was far more humanitarian than any of her predecessors and built bridges with Ireland that none of them ever did. It was well known that she wasn't at all comfortable with Margaret Thatchers regime, be that for her absolute intolerance in NI or her treatment of the miners during their strike. The Royal family wield no power, can barely express an opinion and are far more of a tourist attaction than a branch of government, yet people still personally hold the current descendents responsible for the Anglo-Norman invasion and all that's followed since!
I have relatives that were in the Old IRA, they took part in the Easter Rising and were jailed in Kilmainham, on release they had to emigrate to the US because they were not safe from persecution by the British Army. Any of my family I have spoken to have expressed their condolence, and remarked that wasn't it great that the Queen had such a good long and generally healthy life and she wasn't the same since her husband died. No digs at the past, even though we have good reason to. There's far more ire levelled at our current government and the shambles they've made of housing etc.
The past can't be changed, the future can. There may well be a United Ireland in our lifetime. Time to move on.
Just to add: This has gone completely off topic, sorry.