Yes, well, obviously according to you there is absolutely no problem in the US as a result of having free and easy access to guns and semi-automatic firearms.
Except there is a big problem:
So far this year, there have been more mass shootings in the US than there have been days of the year.
Children as young as kindergarten are taught classroom lockdowns.
Children are getting hold of guns and shooting other children with them.
America has a cripplingly high homicide rate.
America has a cripplingly high gun death rate - and only a tiny proportion of those are deemed to be in true self defence. Most are accidental, because of an argument, domestic violence, suicide.
I could go on. These are things we simply don't have in the the UK, because we don't have many guns, and they're hard to get hold of. The problem is guns, and pretty much anyone being able to buy one at a corner store.