Okay, then it should be easy for you to find some statements from southern political leaders citing those other issues as the cause for their actions.
It seems that most of the Lost Cause insistence that there were lots of issues and slavery only a minor irritant is simply excuse-making. The fact that slavery and the threat that Lincoln's election posed to it was far and away the most cited cause for southern actions is embarrassing, hence a need to put the causes elsewhere. The problem is that the contemporary documents and statements simply don't support such an argument.
Here's Alexander Stephens, the Vice President of the confederacy:
"The new Constitution has put at rest forever all the agitating questions relating to our peculiar institutionsAfrican slavery as it exists among usthe proper status of the negro in our form of civilization. This was the immediate cause of the late rupture and present revolution. Jefferson, in his forecast, had anticipated this, as the "rock upon which the old Union would split." He was right. What was conjecture with him, is now a realized fact. But whether he fully comprehended the great truth upon which that rock stood and stands, may be doubted. The prevailing ideas entertained by him and most of the leading statesmen at the time of the formation of the old Constitution were, that the enslavement of the African was in violation of the laws of nature; that it was wrong in principle, socially, morally and politically. It was an evil they knew not well how to deal with; but the general opinion of the men of that day was, that, somehow or other, in the order of Providence, the institution would be evanescent and pass away... Those ideas, however, were fundamentally wrong. They rested upon the assumption of the equality of races. This was an error. It was a sandy foundation, and the idea of a Government built upon itwhen the "storm came and the wind blew, it fell."Our new Government is founded upon exactly the opposite ideas; its foundations are laid, its cornerstone rests, upon the great truth that the negro is not equal to the white man; that slavery, subordination to the superior race, is his natural and moral condition.
It is just a shame that the PC crowd, the education system and so on has hammered the slavery issue so much that even many Freepers buy into the brainwashing where critical thinking is shut down.
Then I invite you to read the original documents for yourself.
Stephens is vilified in this but compare it to Lincoln's speech of the 1850's. Are they not much the same?