I would say having access to guns in the US makes killing someone much easier than in the EU where most countries banned guns, making murders much harder to commit with a knife or a blunt object.
But this aside, did the murder rates increase in the last 10-20 years, decreased or is it the same?
Switzerland has a lot of guns but a homicide rate below 1 per 100k, it is not necessarily the guns as such.
US rate is a little bit up from early 2010s, but a lot lower than in the 1980s, in the EU the rate was low in the early 2020s compared to the previous ten years.
But this aside, did the murder rates increase in the last 10-20 years, decreased or is it the same?