Yes, that's the dividing line.
Specific example that I linked:
>Rallies organized by Likud and other right-wing groups featured depictions of Rabin in the crosshairs of a gun. In July 1995, Netanyahu led a mock funeral procession featuring a coffin and hangman's noose at an anti-Rabin rally where protesters chanted, "Death to Rabin".
>Netanyahu denied any intention to incite violence
Rabin was subsequently shot dead.
The definition in Wikipedia says:
>Stochastic terrorism refers to political or media figures publicly demonizing a person or group in such a way that it inspires supporters of the figures to commit a violent act against the target of the speech.
Of course, direct "kill this person" language is not a requirement for that. "Won't someone rid me of this meddlesome priest?"[1] is a famous example from the 12th century.
>If "XXX of party YYY is a disgusting piece of human garbage" than I don't think that should be called terrorism.
By itself, it wouldn't be. However, if XXX of party YYY subsequently starts getting death threats or other harrassment as a result of this statement being made, there is a problem.
Which language a public person uses to indicate a target to their followers highly depends on the context and history of the particular public person and the group they are addressing.
Hopefully, you understand why doxxing[2] is problematic. There are real-life consequences for the person being doxxed. However, the language is perfectly benign; after all, there is no explicit call to action in an address, a phone number, a name.
Stochastic terrorism similarly leverages context and publicity to highlight targets. It's not about how you would interpret the message; it's about how the target audience interprets it.
In Tran's case, both the message (die slowly) and the target audience's interpretation (a call to harrasment) indicate that there was no miscommunicaiton.
[1] https://en.wikipedia.org/wiki/Will_no_one_rid_me_of_this_tur...
[2] https://en.wikipedia.org/wiki/Doxing