In the UK and AU guns were grabbed. Those populaces are largely disarmed. How? Easily. The people were told it was wise and had little previous experience of government rights grabbing. Had they ever faced prohibition laws? I don't know, but I don't think so.
Not so here. The government made alcohol illegal, but citizens held out continuing to produce it. The government tells us this is wise and that is wise, but often it lies. Our government lied about the dangers of smoking, about what was nutritious and what wasn't, about marajuana, about many things. We can't trust it. We have this thing where the government officials will show up and say "We're the government. We're here to help" but they aren't here to help. That same government occasionally says something like "We want to take away your arms rights, but its for your own good."
More recently in 2008: "The government has decided to make public education better by instantiating standardized testing in schools, and we're going to write the public school curriculum nationwide using a couple of corporations we have enlisted for the task. Its going to be great." It wasn't great.