There you go! I honestly believe that is why a large percentage of men enlisted. Some didn't really want to but were commanded to. For every family there is a story and it doesn't matter who did or did not own slaves after the shots were fired. In many bio's I've read of the regular soldier, it was because their "state" was at war. The only time I believe there was widespread 'Freedom Fever' was at the beginning of the Revolutionary War and it wasn't caught by 100% of the population.
The war was pre-planned by politicians with ideas. Some of them were sound ideas, some just rants. The election of Lincoln just racheted the retoric. Lincoln called South Carolina's bluff and was probably a little taken aback when they didn't flinch. I believe he had thoughts that his side would quell the rebellion in one action.The rest is, as they say, history. The 'common' man did not plan, not did they order the first shot. They just followed orders after that. In the South, it was more important to try to keep the Union troops away from their home than any political ideal.