OP, as someone born and raised in Brighton, I can tell you that Peacehaven has had a reputation for being a shithole, inhabited by unpleasant people, for pretty much its entire existence. Look at Graham Greene's description of it in Brighton Rock, for a start.
The thing is, you are trying to compare crime rates in the UK (pop 65+ million) with the likes of Norway (pop just over 5 million) - you're not comparing like with like and of course it will make the UK look bad.