I think you're trivializing the issue quite a bit. But yes, I dislike the paternalism of considering everyone else on the internet stupid and incapable to making informed decisions when facing questionable points of view.
I'm not qualified to speak with any authority about this issue, but my opinion is that people that are willing to shoot other people most likely have other incentives than reading a singular's dude online hate ramblings. The problem lies with the fact that they gets ostracized and _all_ they are able to read are the hateful things. If you go through the thread above, you'll see that my stance is the complete opposite of that: let's allow people say the "bad" things and balance them out with other peoples' "good" things.
This theoretically would ensure that this person is not exposed to only hate and negativity, and will hopefully make a better decision than ending others' life and their own.
Forcing this unbalanced individual to retreat into a corner of the internet where his opinion on other people goes unchallenged is unquestionably A BAD THING, and I doubt I'll change my mind on this fact any time soon.