Does every martial art teach respect and discipline?
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Something that most people do not realize is that the discipline and respect that comes from martial arts, does not come from the style they train in, but the teacher they have.
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In martial arts, students will develop those virtues because their teacher is good at instilling those values in students. Regardless of the style, respect is not an attribute of any martial art, only of the instructors.
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Why martial arts? Any high level physical training (ball sports, climbing, biking, swimming) with the right instructor will teach respect and discipline. Martial arts are not magical. They are about fighting, controlled violence and reaching a comfort level with those things, such that one is not incapacitated merely by their occurrence, and developing effective techniques for delivering one’s own violence.
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The respect and discipline are necessary for safe practice. And serious, diligent practice will lead to those attributes.
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If you are trying to install these virtues in younger students, then you must understand that first and foremost, parents are the best source to teach respect and discipline. I’m amazed to see how many parents like to throw this responsibility away to arts, sciences, teachers, and instructors, while forgetting that the responsibility is really theirs.
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Every martial art requires discipline, and every martial art teaches respect for the instructor and the art.. but whether or not it teaches respect for other human beings outside the training environment; that is an entirely different story.
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Unfortunately, there seem to be more “McDojo” schools around than there are truly good schools, with far too many self-professed “masters” claiming credentials they could never justify if challenged by somebody knowledgeable.
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Morals, ethics and values have literally nothing to do with any individual martial art, and EVERYTHING to do with the individual martial arts instructor. The oldest and most respected art in the world can be ruined by a single instructor with a poor ego. 
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 Photo credit: Lyoto Machida & Machida Karate Association
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