The Brits having a more liberal definition of violent crime is their problem so let them be proud of their being four times more violent than Americans!
Look friend, I’m an American. I’ve walked around my share of large American cities, and I’ve walked around a number of British cities. I felt a lot safer walking around Brit cities. If you think large Brit cities are more violent than large American cities, you’re being misled. They might have more property crimes, but they’re for sure not nearly as violent as large American cities.