There's a very interesting comment from a tabloid sports writer in his respect, which I think is worth quoting It's about football fans booing at minute's silence, but he goes on to make a wider point about when making your point is appropriate and when it's not
At the Theatre Royal, Bath, on Friday, during the minute's silence it was possible to observe four people in the stalls who remained seated.
One of them was also the loudest and most demonstrative audience member when the production concluded, so maybe she just liked being noticed. The point is, it didn't reflect on the theatre that a handful did not stand. It's a free country and they weren't disruptive.
There are times, though, when if you can't say anything nice, best not say anything at all, and one of those times is now.
It is why there has been such a backlash against the likes of Trevor Sinclair and Jedward. Not because there can never be discussions about colonialism or abolition - both are valid topics, whatever your view - but because when the much-loved Queen has just died, people are not in the mood for a poorly-considered hot take on Twitter.
It is possible to be a republican and respect duty, responsibility and service, or to respect the feelings of others, or that a family, no matter their status, has just lost its matriarch. That is what many Labour MPs who are not monarchists have been doing.
Or tl:dr - it's about that famour phrase - reading the room. Which it appears a lot of people find quite difficult ATM. This is why countries like NZ and Australia who have flirted with the idea of becoming republics are saying 'now's not the time to discuss this.' It's recognising that while you might not like or respect the institution, it's also about a family publicly going through a harrowing personal time and the polite thing to do might be to zip it for a bit because right now it isn't about you.