Just because something is "traditional" doesn't mean that it is necessarily right or that everybody should support it or adhere to it.
I believe it was in 2009 or thereabouts that the queen, allegedly because of health and safety concerns, had to abandon the "tradition" of servants and visitors walking backwards when leaving her presence. Some dyed-in-the- wool traditionalists may have considered that change to be "disrespectful". My feeling is that imposing the indignity of having to walk backwards out of a room shows enormous disrespect for "ordinary people".
I also think it is unreasonable for citizens, including public figures, of a supposed democracy to be dragooned into singing the praises of a monarch because to do otherwise risks them being labelled "traitor", "disrespectful", etc.
Sing to your hearts content monarchists but don't impugn the character, patriotism or general worthiness of others who choose not to.