What authority? Well if you are there, they have every right to shoot you. After all warnings were given that they will shoot if the crowd does not disperse. Doesn't matter what race or nationality you are.
troops: u part of riot party?
me: u guess leh? guess where i from which country LEH
troops: leh beh la *biang biang*
ok jokes aside, i still dont think how they acted was the right way, threatening them to kill them even by looking at them is merely an act of terrorizing with themselves armed and the protesters and innocent not. Having orders to follow does not warrant such authority to kill as they please or even mentioning of such threatening sentences.
Yeah .... most of the countries the demonstrants is protest in front of Myanmar embassy, i think the whole world should press the regime to end and free the citizen of Burma. Recently the oil price hike is uncontrolable and hence the poor becomes more and more suffer in Myanmar.