England and France were supporting the South. After the Emancipation Proclamation the North enlisted 178,000 blacks to fight. International support for the South faded. With the end of the War, hope are high among freed slaves. Emancipation is seen in religious terms.
Racism results in distortions of vision.
There is no recognition that Blacks fought to free themselves. After the Civil War the defeated South was ready for a new solution, but the Republicans had no plan for Reconstruction. Andrew Johnson objects to the 14th and 15th Amendments. Blacks serve on juries and in the Senate. It was galling for them to see Blacks acting with new confidence and asserting themselves.