There's a really classic cliche every time you switch the TV on - you see cops arguing. I have spent a day a week for many years in the presence of police and I have never seen them argue. It's a military hierarchy. They do what they're told. There's no bickering.
Most consequential choices involve shades of gray, and some fog is often useful in getting things done.
Immigrants provide skills that we simply cannot afford to do without. They have contributed hugely to Britain's success.