Here's ammunition that these professional Confederate soldiers placed their allegiance to their state above that of the Federal Government.

Professional soldiering seems not to have appealed to Jubal Early; he resigned from the U.S. Army in 1838, just one year after graduation from West Point, and went back only briefly in 1846 to do his duty in the Mexican War. He had argued caustically against secession and for the Union until his state seceded, whereupon he became an equally caustic supporter of the Confederacy and a colonel in its army.

One cannot be considered a traitor or of treasonous behavior having submitted resignation from the service.