The common Confederate soldier fought because their country was invaded by a dictator.
Quote the record.
"... a North Carolina mountaineer wrote to governor Zebulon Vance a letter that expressed the non-slave holder's view perfectly Believing that some able-bodied men ought to stay at home to preserve order, this man set forth his feelings: "We have but little interest in the value of slaves, but there is one matter in this connection about which we have a very deep interest. We are opposed to Negro equality. To prevent this we are willing to spare the last man, down to the point where women and children begin to suffer for food and clothing; when these begin to suffer and die, rather than see them equalized with an inferior race we will die with them. Everything, even life itself, stands pledged to to the cause; but that our greatest strength may be employed to the best advantage and the struggle prolonged let us not sacrifice at once the object for which we are fighting."
-- "The Coming Fury" p. 202-203 by Bruce Catton.
"Though I protest against the false and degrading standard to which Northern orators and statesmen have reduced the measure of patriotism, which is to be expected from a free and enlightened people, and in the name of the non-slaveholders of the South, fling back the insolent charge that they are only bound to their country by the consideration of its "loaves and fishes," and would be found derelict in honor and principle, and public virtue, in proportion as they were needy in circumstances, I think it but easy to show that the interest of the poorest non-slaveholder among us is to make common cause with, and die in the last trenches, in defence of the slave property of his more favored neighbor.
"The non-slaveholders of the South may be classed as either such as desire and are incapable of purchasing slaves, or such as have the means to purchase and do not, because of the absence of the motive-preferring to hire or employ cheaper white labor. A class conscientiously objecting to the ownership of slave property does not exist at the South: for all such scruples have long since been silenced by the profound and unanswerable arguments to which Yankee controversy has driven our statesmen, popular orators, and clergy. Upon the sure testimony of God's Holy Book, and upon the principles of universal polity, they have defended and justified the institution! The exceptions, which embrace recent importations in Virginia, and in some of the Southern cities, from the free States of the North, and some of the crazy, socialistic Germans in Texas, are too unimportant to affect the truth of the proposition."
--J.E.B. DeBow, 1860
DeBow was the taker of the 1850 census.
The record of the day doesn't support your ideas.
Walt
The following emendation of your statement would be considerably more accurate:
The almost infinitesimal portion of the record of the day which I have selected because it tends to support my own views doesn't support your ideas.