Were many confederacy civilians not aware of the Confederacy's aims to leave the union over the issue of slavery?

I have heard it said that a lot of people who fought in the civil war for the confederacy fought the war believing they were preserving state's rights... not slavery. They were unaware of the fact that most of the states that succeeded cited slavery as the primary issue.

I have heard it said repeatedly that Jefferson Davis lamented the fact that he didn't have a stronger federal government to get some of his states to obey his orders. Apparently some state senators refused to obey his orders during the war.

NOTE: I know what the lost cause is. I am NOT a lost causer. I just wanted to know if there was a sizable chunk of the confederacy that was unaware of the main reason that the confederacy cited and if they were tricked into fighting this war.

Were many confederacy civilians not aware of the Confederacy's aims to leave the union over the issue of slavery?
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