Yes, the fact that the American Civil War started in a man's front yard and ended 120 miles away from his new home is a coincidence. It does not make sense to believe that the war was about the homeowner or had anything to do with him. People know what the Civil War was about no matter where is started and ended.
Yes, this was a coincidence because these things happened to coincide despite the improbability. Whether you believe in fate or destiny is inconsequential. By definition the fact that the war began and ended in this man's home is literally a coincidence in addition to whatever else you may deem it.
The American Civil War began in a man's front yard, and ended 120 miles away in his new home's front parlor. The odds of such a long, and bloody conflict beginning and ending at the homes owned by the same man is remarkable. In short, this has to be the most incredible coincidence in history.
After carefully considering the question, I feel that while it is quite startling for the American Civil War to have both begun and ended on and in properties belonging to the same individual, nothing points to the fact that it could be anything other than a strange and almost humorous coincidence.