I think you are misunderstanding the issue. Nobody is saying it wouldnt work. Yes, if you remove guns you will have less gun crime. If you remove cars you will have less accidents. The issue is the 2nd Amendment and what to do about the hundreds of millions of guns already owned by people. The issue is Europeans have the trust of their Governments. The average US Citizen despises half the people in power in our Government, they despise half the population that voted for them. SOOOO, we have a population that DISTRUSTS our government. Hell, when they try to pass laws that determine who can or cannot marry, who can or cannot have abortions, etc..etc.. who can blame them.
We have a population that distrusts the very law enforcement entities that are sworn to enforce laws.