What Bob Herbert is politely saying is, nobody cares because little black kids were rounded up. I'm sure New Yorkers attitudes would be different if these were little white kids.
When crime actually occurs the police wonder why no one from these communities step forward. My guess is the witness would be charged with whatever the police can manufacture.
Sadly, folks are actually befuddeled as to why young black men are angry. The argument if they aren't doing anything, what's the big deal is always offered by someone who is not rounded up "just because."