I heard yesterday that the memorial is actually a grave. There is body buried near or under it. The guy buried there was against slavery. Then I found this.
“If your elected official is concerned about Anti-semitism, perhaps they should be asked what they are doing about the US Army’s post-Hannukah plans to remove the most important work of arguably the world’s most important Jewish artist, Moses Ezekiel, which marks his grave at Arlington National Cemetery.”
"Ezekiel's grave on the north side of the Confederate Memorial at Arlington National Cemetery."