secondly, in WWI the German Empire did not aim to "destroy the UK"
I would suggest picking up a good book on World War One history
“As I said above — your facts are doubly wrong. In World war One 700K British and Empire citizens died. “
Over a million soldiers died. Up to 1.2 million including civilians.
As I recall, the Brits joined the frogs on the continent to repel the Huns
The Brit mainland was never threatened.
On the Western front, France was the objective. Belgium was just in the way of the German attack
The German Empire didn’t even want to destroy France. They wanted to be the dominant land power in Europe. They would have been happy with a return to the status quo. Their whole reason for war was to protect Austro-Hungary & fear of Imperial Russia. The nations that wanted war were Austro-Hungary, Serbia & France in that order.
Austro-Hungary - Serbia went to war because there was always “Some damn fool thing in the Balkans”.
France - revenge for the loss of Alsace-Loraine. Treaty with Russia gave them an excuse.
Russia - protect their Slav brothers\co-religionists from the mean old Germans both the North ones (Imperial Germany) & the South ones (Austro-Hungary)!
British Empire - Protect Belgium, fear of the German High Seas Fleet, outdated policy of maintaining (somehow!) a balance of power on the continent - dates back to Marlborough.
If Russia & GB had stayed out of it, it would have been another Balkan shoot’em up. No WWI, no communism, no Nazism, no WWII, world would have been a better place.
WWI truly the greatest man-made disaster of modern times.