Learning Taekwondo without the philosophy that shapes it would be like learning how to use a firearm without being taught respect for human life and responsibility.
You don't need to practice any particular religion to do Taekwondo, but you should absolutely be respectful of the philosophies that are a part of it. Otherwise you run the risk of becoming a thug.
This I don't understand. Most people I know come to the study of the martial arts with an ethical world view that other people would regard as perfectly fine. They already
know about 'respect for human life and responsibility', as part of how they were raised, their experience of life with other people and so on. When they learn a martial art, TKD or anything else, the same things that constrain them in the use of violence in other areas constrain them in their use of the MA they've learned.
Think of it this way: does your education in the morality of violence
begin with your introduction to firearms? As many people on MT point out, the vast majority of gun owners do not use their weapons to inflict damage on the innocent. Did they only learn that principle when they applied for their gun license? Or was it part of their ethical makeup from early on? What you learn when you're introduced to a weapon is safety procedure and due care and caution; but the ethical foundations themselves... those, you'd better already
have. Are you going to learn the Golden Rule or whatever from your
firearms instructor?
I think it's the same with the MAs. You aren't going to be learning fundamental ethics only at the point where you start doing TKD, karate, hapkido or whatever; if you are, you've been in
biiiiig trouble for all of your life before then. I can think of a hundred people I know who might, at one point or another, decide to take up TKD, and not one of them needs any more ethical training to be a decent person and a responsible exponent of that or any other MA than they already have. If you wait to get your ethics from your MA instructor, it's WAY too late in the game, IMO. And if you don't have a fundamentally decent way of dealing with other people by that point, are you really going to acquire one in a TKD class?