Why do you think Lee went into PA if not to live on stolen Yankee private property?
Lee's objective was military. General Lee's objective was to induce the Union Army to disperse across a broad front along the Mason-Dixon line, and then, by maneuver, draw it to a point far from its base of supply where it could be attacked and beaten in detail.
You keep trying to establish some pathetic moral equivalency for your Uncle Billy, but it ain't gonna work, pal.
Lee only took items to sustain an army in the field. Look at it as a down payment for the grand larceny the yankees inflicted on the South.