Not as disturbing as your distorted version of U.S. History.
Who invented the institution of slavery is not in question here. The question was: do we allow it to expand to the new states. The south could see where the trend was heading and in an effort to preserve the institution of slavery decided to secede. The inexcusable decision Lincoln made was the only one left if the Union was to be preserved.
Unless you would rather be living in the CSA?
The expansion of slavery was at the center of the national debate.
The following article may be hard for you to read but in my case, it helps explain this bizarre debate we've been having.
http://www.salon.com/2013/03/16/the_s ... lies_about_the_civil_war/