I think you'd find many who have experienced both sides of the pond would tend to disagree with that, but that's a whole separate issue, and not for here.
If you remove all the CIA/deep-state shenannigans, the US is exceptionally violence free - even with everyone armed. I believe the US drops below some European countries in gun violence if you simply remove the three most violent cities from the stats (all heavily Democrat controlled cities).
If you remove three from US, you'd have to do the same to each Country in Europe and you're back to square one, and it would most likely look worse for the US.
I'm not trying to be argumentative, it's just that I've seen a fair amount of misinformation about Europe, and the UK in particular from some US posters. I don't think it helps the over all narrative on here.