According to a posting at YNET (and I'm not vouching for its accuracy)"
"The attacker was from Rishon L'Tziyon, not Tapuach, unless Rishon is also a settlement. He was a crazy that was kicked out of the army, and the GSS had a long file on him. His only conenction to Tapuach was that he wandered around there ranting after the army kicked him out. In Tapuach they reported him as a provocateur."
Unfortunately, there are emotionally disturbed individuals in communities all over the world. Sometimes they link their illness/anger to external circumstances, and sometimes they retreat into their madness. It appears that this was the situation on the bus.
Unfortunately, I also read that the shooter was lynched by a mob, so, like Lee Harvey Oswald (admittedly, their targets were quite different) we'll never have the opportunity to hear his story, however deranged it may have been.
There ya go. A crazy provocateur who is now going to be taken as existence that ALL the settlers are crazy, when in reality, a few rotten apples give the whole barrel a bad name, even when they bad ones are taken out in time. I read the shooter was taken into custody, so hopefully we will see justice.
'Unfortunately, I also read that the shooter was lynched by a mob'
This reminds me of Baruch Goldstein. Not that I condoned his actions, but isn't it amazing that it is just assumed as fair that the "mob" should take the law into their own hands (when it concerns arabs against jews), when the world would be up in arms if the Israeli army, instead of calmly dis-arming captured suicide bombers, would beat the crap out of them and then string up their pulverised bodies and display their blood covered hands.
Isn't it just a truism that blood-lust behavior is expected and given a pass only for the Arabs.