Another way to see it is the US is kinda like the European Union where countries (in the US we call them states) organize under a central authority. People don't vote for changes in the EU. Instead the countries submit votes, and the people vote inside of their countries.
People don't realize that the US is made up of individual countires because we have broad freedoms.
The founding American philosophy is a culture of defiance and independence.
This is totally different from the European countries which were founded ages ago by kingship and royalty.
Even today, many Europeans worship their kings and queens.
This should be totally abhorrent to true Americans. Worshipping royalty is a slap in the face of treating everyone with equal respect. Royalty means some people are BORN to be servants while others are BORN to rule them.
The fundamental unit of society for America is the individual.
Those EU countries mostly are about their national pride, ethnic heritage, etc. (with coats of arms and other such bullshit).
This is why we have guns and related rights enumerated in the constitution of These united States, and why such rights are totally baffling to Europeans who don't understand why we would need guns and protection from a loving authority.