They're a warlike, no nonsense people in their own habitats in the Punjab, Gujarat, etc. I believe a tenet of their faith is that every man must be armed at all times which means they usually carry daggers. Who knows what the Americanized deracinated types are like, but here's my bet: the more Sikhs you have on the police force, the more Trayvon incidents you'll have.
The British put there natural tendencies to good use keeping Pashto and Hindu alike in line. They're a fearless "stubborn" people ... which is why the Canadian mounties, British Army, etc., let them have their way w/ the turbans long ago. Having rubbed shoulders with them when I was younger on the subcontinent, i can say that, among third worlders, they aren't so bad.
When India goes the way of Yugoslavia and the USSR and splits off into various ethnostates ..... the Sikhs will finally have their homeland again, and I will be most delighted to sign deportation orders for every last one of them in North America under WN regime(s).
What rational human being would want to serve on the District o' Corruption police force? If the Sikhs now flock into the force will they someday stage a "Sikh-out" for pay raises?