I have a lot of interest in the Sikh faith, and find their concepts of honour and martial virtue very laudable. However, to the best of my minimal knowledge the temple attacked was attacked because it housed terrorists and terrorist weapons.
Putting both weapons and users inside the most holy temple was hardly an accident or make-shift. It must have been deliberate. I cannot therefore find outrage very convincing. What possible alternative would the authorities have?
Besides which I think there's some pretty obvious criticisms to be levelled at any Sikh who targets innocents with terror. Surely that's hardly the way they are supposed to fight?
having said that, I could easily believe that the authorties didn't handle the attack with good grace. But that's an adjunct to the primary cause - the people using the temple as cover.
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Just my two pennies.