During the 1980s the homicide rate in Britain rose by 50 percent  The weapon used usually was a knife  Potentially lethal knives are sold openly and legally in many shops  Most homicide deaths occur as a result of unpremeditated assaults within the family  Even if these are increasing, they would probably not result in deaths if it were not for the prevalence of such knives
Thus the blame lies with the permissiveness of the government that allows such lethal weapons to be sold
If the potentially lethal knives referred to are ordinary household knives, such knives were common before the rise in the homicide rate; but if they are weaponry, such knives are not generally available in households.