Because at that time, The pathway to Lusittiana was a territory conquered by the Germans troop during their conflict with Great Britain in World War I.
The Germans give the warning following the international law of warfare at that time that indicates each nations should give warning to normal civilians if they intended to target a certain area.
White supremacists carried medieval signs in Charlottesville because the miedeval signs are used by people in France and Britain to represent a time of racial purity in their country that never existed and never will exist. In general, white supremacists just want to make up fantasies of a time that never existed with the miedeval signs.
they preferred slave because the were cheep all they had to do was feed them and give them a home