of course it is, a maniac with a knife is going to be much easier to stop than a maniac with an ar15 and a bunch of mags. that's not a debate-worthy outcome even by internet standards.
there are mental health problems in the uk- the suicide rates attest to that, but we don't get bi-weekly shootings as a result.
I didn't say a knife is easier to stop than a bullet. I'm saying that person is still there whether it's a knife or bullet.
Yes there are mental health issues in the uk, and suicide rates are significant, but bad mental health doesn't automatically mean they want to kill children.