Not sure why people are surprised by their reaction. They made it clear that white people can't commit serious crimes/acts of terrorism when they changed up departments to only focus on Islamic extremism.
Did people think that only applied to Muslims? Nah. Now watch if a black guy does this to someone, watch how they'll bring it up at the first available press briefing and condemn the shit out of it, the guy and the black community as a whole..They've made it clear where their allegiance and priorities lie.