Complex sentence: They came back dressed in Nazi uniforms with Swastikas, as a result, Sullivan angrily ordered the Stones to change back into their original performing outfits, however, the Stones left the studio altogether.
Split into simpler sentences: They came back dressed in Nazi uniforms with Swastikas. As a result, Sullivan angrily ordered the Stones to change back into their original performing outfits; the Stones, however, left the studio altogether.