It's not a rationalization that police lives are more important, but rather about the stupidity of holding up a phone in such a way towards the police engaged in a dangerous situation that it appears as though you are acting aggressively towards them. The officers only have a limited time to assess the threat of any given person before more lives are lost due to an unknown danger. It's a high stress situation and wrong decisions are easily made. The officers weren't right in their immediate assessment of the danger, but that doesn't mean their actions were unwarranted.