You must get that people are here to talk about some politicial commentary, and you're saying "well, I'm not convinced in the concept of duty". It's like turning up to an astrinomy club and saying "you can't prove these stars aren't a dream of mine!".

You seem to be a bit off on one. Your analogy doesn't make sense. Someone posted an opinion article which contained a statement that I questioned. Other people responded to my questioning. Discussion ensued. Seems pretty normal and expected to me. It seems like the misunderstanding is on your part.