Movies like Diablo

This is a story about a deeply disturbed civil war veteran and mass murderer searching for a woman that he kidnapped to be his wife. She was rescued by her brothers and husband. During his search we see him as a split personality, one, the sad war veteran, and the other, the evil mass murderer. As the story unfolds, the sad war veteran takes on the personality of the evil mass murderer. The murderer goes on to find the woman he was looking for and to murder almost everyone.