They can't and they know it. It's why their here, their last vestige is to appear on forums like this to display their frustration that CCW is growing, gun ownership is up, crime is down, they cannot resolve the fact that the crime rate growth is in areas where gun control is highest. It does make for many humorous BM posts though.
Since we that live in America have a set of constitutional rights that may of may not be approved of by those from afar, perhaps those that don't understand those rights may choose to move to a country that makes them feel comfortable, say North Korea for example.