Not taking people's alt accounts that are also spamming this and other Trump related posts seriously is dangerous at best. There's a pattern here that's not hard to see.
I see 4 accounts making direct death threats, all 4 are green. You're choosing to intentionally assume the worst case about them being people's alts. The most dangerous thing here is your desire to prop up the narrative that a meaningful portion of this community were proposing to respond to this attack with political violence.
The point isn't how many there were. The point is that they were a bunch of newly-created troll accounts and aren't actually members of the HN community at all.
Not taking people's alt accounts that are also spamming this and other Trump related posts seriously is dangerous at best. There's a pattern here that's not hard to see.