Well, although I agree that he should have right to explain his reasons I truly believe that the timing was not the best. His statement provoked a huge stir (if the stir can still get any bigger in Nepal anyway) and the Parliament has even asked the Government to take some actions against the King. In other words, it depends on what is more important for the King. If he wants to explain his actions before being dethroned then it was an excellent move. However, if he wants to save his crown or at least to save the crown for one of his grandchildren (and that should be his priority), then it was very unfortunate.
: It is certainly better to do it now when he
: is still king, as he doesn't know if he will
: get the chance later.
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