Obama spoke, immediately, when a freak shot a baby murderer.
Obama, spoke out, immediately, when a black man and his friend broke into a house, calling the police who simply wanted proof the man lived there, stupid.
Obama never himself commented, but the Whitehouse issued a statement a few days after Islamist shot two men at an military base.
It’s a fair point, and there is a pattern of such behavior practically going back to Inauguration Day, 2008. Each crucial event requiring decisive Presidential action is met with procrastination; every single public critique of the President is met with a rapid response, and often a snarky one at that.