This really is a daft proposal, as it stands, it is couched in words of your choosing you want me to answer to, but I will nevertheless respond and couch it a different way;
There is a war going on between Israel and Hamas in parts of Palestine, and whilst numbers may be disputed, it's true civilians are getting caught up and dying in the war, many its believed in Gaza are children; so therefore yes, of course in the interests of humanity I would support a ceasefire immediately, if both sides could agree.
As far as protesting, in the UK, about the war is concerned, then yes also I would agree people are, and should be allowed, to protest. Personally I think the UK government and the opposition will not change their stance on the matter, unless the Americans do, but protest should nevertheless be allowed.
However, as someone who personally holds both the Armistice and Remembrance Sunday occasion dear, I would have asked the organisers' to reconsider, if either the dates or the nature of the events could have been arranged to respect the views of those also affected by what these two events represent, i.e those who have lost relatives and loved ones and many innocents in two WW. In particular in my case WW1 where I lost my grandfather whom I never met, have only 1 photograph of and the only direct link were his medals and what my grandmother told me. I never met this man, yet on these two days each year, and this year being nearly 100 years later, still I grieve for him. He joined up with and died alongside 5 of his friends and neighbours who answered their country's call to arms in 1915.
Yes, I am an old man myself now, but this is important me, and I know to many, many, others. I agree that both the Armistice and Remembrance Sunday occasions are diminishing in the collective memory of the people of this country and for some have no meaning at all. However I truly believe once you stop remembering or even caring about your dead, who gave their lives for their country, there is no future for any of us.
The truth is nothing in Gaza would have changed if this date had been change, a lot of support might have poured in or indeed a lot of attention of the right kind may well have attached itself to further protest, an opportunity was missed.