The country that is the world champion in school shootings doesn't have much credibility when pointing the finger at others.
Rather than introducing sensible gun laws, they'd rather try to paint someone else as the villain.
While what you are suggesting is useful information no one outside the US needs to know it. We already know they are throwing stones from their glass house. Anyone inside America won't believe it.
Government response should be.... "While the government sympathises with your plight and considers protecting its citizens a core duty, recent events have left the government under manned and thus powerless to protect those who cheer on the downsizing of the government until it directly affects them. Therefore please accept our apologies but until such time as staffing levels allow us to focus on anything but the absolutely vital functions of government which are already more than we can handle, we will not be able to offer you any support."