There's a difference between focusing on specific ethnic groups for specific
cases, and daily harassment.
Plus, speaking of economy of resources, it's more economical to monitor
specific behaviors of any ethnicity than to swipe over large specific ethnic
groups.
Less people to monitor, better results.
The best sniper in ISIS is a chinese teen girl.
It could be a joke: there's even and irish jihadist...
(https://www.thejournal.ie/irish-suicide-bomber-3064738-Nov2016/)
And ignoring all the others like they can't be dangerous is far from
objective (or rational).
It's not like irish/irish-americans don't have a long history of crime. Or or
white americans for that matter.
But hey, enjoy your bias, and your trolling.