Many on the left think that dropping the atomic bombs on Japan to end WWII was a racist act that would not even have been considered for Europe. The Japanese internment camps run by the US military are routinely characterized as racist. And there are those who fervently believe that the war in Vietnam was manifest racism. Should all statues and monuments to American soldiers therefore be removed?
Slavery was a universal evil that transcended almost all cultures and nationalities. It is still practiced in parts of Africa and Asia. Is anyone who fought to defend those countries more than several hundred years ago racist?