Ma'am the men of the USCT voiced their opinion quite clearly w/ their actions. They served and their voice was obvious where it counted. You may not consider them southern or relevant; they did and their impact upon the war is rather obvious no matter how much you might wish to deny or belittle it.
The claim that the USCT were all 'volunteers fighting for freedom' is a well-crafted Northern
myth-
"all able bodied negroes that can be reached shall be taken to fill up the colored regiments"
"the able-bodied negroes...may be taken possession with or without their own consent"
"All negroes who have not been employed in accordance with published orders may be taken to put in the ranks"
Maj.Gen. U.S. Grant, August 28, 1863
"A major of colored troops is here with his party capturing negroes, with or without their consent."
Maj.Gen. John Logan, February 26, 1864
"Negroes in the employ of Government and those hired by citizens, whether by order of the Treasury Department or otherwise, are exempted from conscription"
[meaning the ones NOT in the employ of the Government
were being conscripted]
Maj.Gen. U.S. Grant, February 25, 1864
"All able-bodied colored men between the ages of eighteen and fifty, within the military lines of the Department of the South, who have had an opportunity to enlist voluntarily and refused to do so, shall be drafted into the military service of the United States"
Maj.Gen. J.G. Foster, August 16, 1864