For my part, I think it is less about the specific monuments that I have visited or am aware of - both at home and abroad - than the reverence people have for those sites. Certainly, as was mentioned above, nationalism can be the cause for or the result of the events that lead to monuments being erected in the first place. But like anything on this planet, a symbol can be good or evil, representative of liberty or oppression, or viewed at face value or as a metaphorical symbol of the powers that lead to suffering. I will say this: The day that sanctity is forgotten, the day that reverence for something ephemeral and intangible is attacked, the day that people are no longer moved by the sacrifices of loved ones and strangers, is the day that we have all lost to the very things that ensure the continuation of global strife. Wealth, power and control. I have served and I have fought, but I know that the farther away from my brothers my mind traced the conflicts I was involved in, the more diluted and twisted our cause was made by the powerful, the wealthy elite and the utterly disconnected. Likewise, the animals that I encountered over the years were as motivated by power and wealth and avarice as the most powerful government. We are all different and we all have differing views, and there are no perfect answers to problems in the world. But fight a man for his God, his land or his family and be prepared for violence.
But know this. There are still sacred things in this world. And they should be cherished and protected at all costs and in the face of any 'power'. Be humble, focus on what matters most to YOU, and when you see someone's monument don't let those fuckers win.