You really can't compare these two single cases.
Yes you can use a knife to kill 30 people, but not the way the chinese idiot tried to do it.
Comparing one successful mass murder to one failed one is a very very very poor argument because it only tells us one thing - that the knife is a weapon for a serial killer, not for a mass murderer and should be used stealthily 1 on 1 and preferably slitting throat from behind not 1 vs many.
If i wanted to make an argument just as irrelevant i could add 2 something tonnes of fertilizer mixed with fuel Timothy McVeigh used to kill more than 150 people.
See ? No need for a gun to become a mass murderer. A gun is an ineffective toy compared to a bomb everyone can make.
People kill people, even if you could disarm people which you can't, they would still kill each other with improvised or illegaly smuggled firearms, bombs, gasoline, knives, blunt objects, bare hands.
If we want these mass murders to stop, we need to filter out all bullshit politically correct propaganda and focus on solutions that actually can have an effect.
You're not taking into account the psychology behind the choice of weapon.
Killing with a knive is a lot different than just pulling a trigger from "afar". It's very rare (no facts here, just my knowledge from watching different documentations), that someone changes the "how to". Bomb builders are different guys than people who slay their whole family with a knife, that's what I took from it.
Building bombs is also not legal, plus getting the goods needed for building one of that size is also not an easy thing, as far as I understood it. Also most of the parts are traceable iirc.
And seriously, the avarage joy can FOR SURE cause a lot more fatalities with a semi-auto than with a knive, so comparing these 2 cases can be compared without a problem imo. I've lived with a Steyr AUG for a few months, and you have to be a fucking retard to not be able to figure out how get it to do BAM BAM. Even if you're not quick with reloading, you can take out a shitload of people before someone has the nuts to take you down. But for that case you can get another 3 semi-auto rifles for self defense and hunting, right, so that shouldn't be a problem. Just pull out the another one that is allready loaded! Even nutcases can do that, as we've seen allready often enough.
And even if they have trained and planned their amokrun with a knife long before, chances to get him down before he killed everyone are much higher than with a semi-auto.
And mutant, for your self defense reason against all the psychos out there and no police within 5 minutes:
Get a fucking door and windows that aren't completly useless and garbage, so you won't have the problem of someone intruding your home to begin with, if you really think the world is full of people only wanting your worst.
And for the gun on the streets in a shady neighborhood statement you gave to leSedna earlier: If there's someone who wants you dead to get what you have, he'll just shoot you from behind. No weapon prevents that.
And for torturing/raping/whatever sick fuck they want to do, there are also ways to tranquilize you from afar. Since you think that if someone really wants to do something, he'll plan and train so well, that he can go on a 27kill spree with a knive, getting stuff you need to put down elephants shouldn't be a problem too, right?
Seriously, most of the time I enjoyed your posts, but here you just seem to loose it a bit. Especially talking to people who a take my hat off for their reasoning. It's because of guys like Jind, that I don't like people generalizing "all amis are gun crazy cowboys".
edit: ah damn, didn't see that there was a page after that, so some of the stuff will be pretty retundant I guess