A number of people are equating Confederate soldiers to Nazi Germans. They note as well that memorials to the Nazis aren't permitted in Germany. However, there are no memorials commemorating slavery in the USA, either. However, in both Germany and America there are memorials to the people who fought in wars. Germany, has many of them, including memorials to German soldiers who fought for the Nazis in WWII.

Nazism and slavery are both repugnant ideologies. But commemorating soldiers who fought in wars under those ideologies is normal practice. It's not the ideology that's being memorialized. What's being memorialized is sacrifice, heroism, service and loyalty to a country.