Anti-Trump punks would be my guess.
That pic looks like this has been getting vandalized over an extended period of time.
close.
Anti-American punks more like it. A memorial in Henderson, Kentucky was damaged and Petersburg National Battlefield in Virginia was looted. Not sure what the latino population of KY or VA is lately. But certainly the perps do not share American values or moral standards.
http://www.newstimes.com/news/crime/article/Venice-Vietnam-War-memorial-to-the-missing-7951218.php