Do people remember why it's 11/11? It used to be called Armistice Day. France lost over a million service members in that war. Likewise the British empire countries and Russia. The US lost over a hundred thousand, but a far smaller percentage of the population than the other allies. So whatever it's called, the day is not just about US veterans.
As for those US veterans, they have as many and varied opinions on what is right or wrong or justified or unjustified about war and US involvement as the rest of the population. And they all deserve to be respected, thanked and honored for their service. So, thanks veterans!