It was just a few short months ago that Federal Officers were in a standoff with supporters of Bundy. The Federal Officers killed some of Bundy's cattle, vandalized his property, and were prepared to kill American citizens because Bundy's cattle ate forbidden grass. I don't recall the liberals being overly upset about the heavily armed Federal Officers.
Fast forward to Ferguson. Heavily armed officers are present as Democrat voters engage in acts of arson and looting. And do nothing.