I hate the use of terms like 'knife crime', 'gun crime' etc. As already pointed out, the problems of violence originate with the operator, not the tool. Why focus on what tool was used to instigate the violence? Perhaps to categorise the crime, but then it's a meaningless categorisation; more useful ones would be 'gang-related crime' or 'violent crime'. To me, these terms are used to inflame the emotions of people who should know better for whatever reason -- to sell more newspapers, to get more votes, or to make the user feel better/worse.
Someone made a remark about equating carrying knives with carrying guns. To me, there is no difference between guns, knives, hammers, screwdrivers, table legs, wooden spoons and fresh fruit besides the obvious, literal physical ones. All can be used to do harm, all can be used to do good. Yes, I am one of those people you referred to who would have no problem with allowing more liberal carriage of guns. There has also been reference made to 'essential' and 'need'. Without delving into the dangers of justifying ownership, use and carriage of tools with such terms (do you really literally NEED a computer? What if you use it to look at child porn?) a better case can actually be made for allowing the ownership and carriage of guns than knives; they make far better defensive tools.
Such feel-good activities are very potentially harmful to our community. We are a minority, as we are well aware, and is rightly lamented. In 1988, after the actions of an insane man, controls on shotguns were tightened, certain types of shotgun were reclassiffied (some being virtually banned), certain types of ammuinition were reclassiffied so you had to get specific permission to buy them, and semi-automatic and pump-action rifles in all calibres other than .22 rimfire were essentially banned. This affected a very small proportion of the population -- those who had been through all the red tape and beauracracy to get the paperwork required, but it made for good headlines. Again in 1997 and 1998 most types of pistols were banned (along with a lot of other lets-make-life-difficult-just-because measures), again after the actions of a madman and again affecting only a small proportion of the population. But again, it made for good headlines. (Oh, and I'll let you guess as the actual effectiveness of these laws. As if anyone really thought they would be.)
Politicians by-and-large are whores for votes. If Bushcrafters end up under the bus to win Walminghill-on-the-Stink, this is the sort of issue that will be the excuse.