It makes a wee bit of sense, but so does the argument that if only the government has guns it will be more difficult for non-government people to get them, and that's (for the moment) the majority of people, so you might have less gun violence. I'm not saying that argument makes a lot of sense, but maybe a wee bit.
Both of these arguments miss the point. The point is that the last people you want to have arms are the people who consider themselves part of the government. Therefore, they should be the first ones to disarm.
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