People do not celebrate the end of WWII here. Only the armistice of WWI (which was far worse in Western Europe) is a national holiday, on 11th November.
Americans may not understand just how serious WWI was, as they almost didn't participate in it. Almost 20 million people died - almost all Europeans (the USA lost 115,000 people, against 1,700,000 for France and 2,500,000 for Germany). Yes, tiny France (the size of Texas) lost more brave soldiers in WWI than the huge USA lost in all its wars in the 20th century (WWI, WWII, Korea, Vietnam, Nicaragua, Panama, Iraq...).
However, apart from being a national holiday, few people actually celebrate it by visiting cemeteries or the unknown soldier's tomb. Only a few elderly people do (always less year after year).
Anyway, I don't see your point. Why is it ok for Americans to celebrate VJ day (Victory over Japan Day, i.e. the end of WWII) but not for some Europeans to celebrate the end of WWI ? You really like to raise up useless arguments for the sake of looking stupid, don't you ?