That was a decision reached in 1790 during Washington's administration. I am not aware of any controversy about Washington DC being the national capital in 1860.
The national debt and its ‘fair share’.
Public debt in 1860 totaled $64.8 million (the annual budget of the federal government at the time was $63.1 million). That is a historically very small amount of debt to have for any nation. Source: http://www.publicdebt.treas.gov/history/1800.htm
I'm not aware of any controversy about the national debt at the time.
When the facts are not on their side, they must create myths, and if one must create a myth to justify their actions, “George Washington started the Civil War because of where he placed the national capitol” is at least creative.