My late Uncle Alec was a prisoner of the Japanese in WW2 and was forced into working on the Burma railroad. He witnessed atrocities so bad, that he hated the Japanese for the rest of his life.
He became a peace activist after the war, and refused to wear either a red or white poppy, because he considered it a worthless act.
WW1 was supposed to be the war to end all wars, yet during it, in 1916, Churchill ordered the naval shelling of Dublin. In 1919 Churchill ordered the bombing of the Bolsheviks in Russia, in order to try to stop the Russian revolution. In the 1920's Churchill ordered the bombing of tribesmen and villages in Iraq and Afghanistan.
In short, there has probably been wars every year since 1918, and it continues to this day in Yemen, Syria, parts of Africa, Afghanistan and Iraq.
So, like my Uncle Alec, I see little point in observing one or two minutes silence and wearing a little red disc.