That's because the Bundys and company were all white boys. White boys with cowboy hats and firearms get special treatment

If a posse of heavily armed black folks, chicanos or indigenous had occupied a federal facility they'd have been shot to pieces and the survivors locked up at the supermax in Florence, CO with Ted Kaczynski and Dzhokar Tsarnaev.  

Hell, Trump would probably call in airstrikes in that situation.