Not gonna comment on the rest of your message (although I do agree with your point about no one being "free" to just murder using guns without consequences (assuming they're caught and found guilty anyway) whether they're legally allowed to possess them or not, because law and morality still apply), but just to say that, to be fair, they said "made to kill", which arguably includes all life, not just humans.
The only uses of guns that I can actually think of myself that don't involve taking the life of a living organism are, as you correctly pointed out, target practice or for sport. But yeah.
Screwdrivers have lots of other practical uses and are not designed primarily to deliberately take life, although they can of course be used for that purpose (just as any number of common household items can, or other everyday things like vehicles, as we've all seen horrifying examples of on the news). But that's not what they're designed for.
Guns, on the other hand, don't have any other practical *non-lethal* purpose that I can see other than the target practice/sports ones we've both mentioned (and maybe, at a pinch, niche cases like blowing open a locked door or destroying explosives from a distance or something). I think that was their point. Even if many anti-gun people don't necessarily have a problem with shooting rabbits on a farm or whatever. (That's a different debate, but the point is about the primary purpose of guns being to kill (something).)
(Even if you argue that guns can also be used as a deterrent or for training purposes, that arguably still only relates to the fact they are designed for lethal purposes. The deterrent factor is precisely because the other person knows your weapon has the power to kill them.)
Also I'd argue similarly that the difference in lethality between a screwdriver or even a knife/sword/machete, etc versus a firearm is enormous. There have been cases where someone let loose with a knife or non-firearm and attacked innocent people. I think we can all agree that the consequences, had they had access to a firearm (let alone an automatic one), can't even be compared. So I, for one, would prefer to live in a world where access to firearms was restricted, or, at least, heavily controlled and regulated (it already is, even in the US, but mass shootings in the US are still all too common, where they're virtually, if not entirely, unheard of in so many other parts of the world where guns aren't commonplace).
Caption this Meme 