AfD support is definitely stronger in the East, but it is not exclusively an Eastern party, and (unfortunately) has very significant representation in the West as well -- and in fact more supporters in the West than in the East (though percentage-wise the support in the East is much stronger).
It's also not a "nostalgia", or regional grievance party in any meaningful sense.
In other words, observations in the parent message that you are vociferously attacking ... are basically valid.
If you're genuinely unaware of these facts, I would suggest you attempt to inform yourself at a level beyond that of a few casual keyword searches.
To be frank, considering the use of a pseudonym and comment history, I'm going to assume whoever is behind this account is intentionally writing in a provocative manner, perhaps to earn karma quickly or some other reason.
Breaking the HN rules and guidelines is quite detrimental when your already starting off with lower credibility.
Unfortunately, in the message I was responding to, you were (1) accusing another user of gross ignorance, while (2) in regard to the subject matter, demonstrating extremely superficial (basically inadequate) knowledge of you were talking about.
So you were provided with a necessary correction. To be frank, I'm not sure what other kind of response you were expecting.
East Germany has continued being economically weaker than the West, which would make them more prone to more radical ideologies in the absence of the prior far-left one. If anything, a historical gradualist Deng Xiaoping figure would mean acclimation and full development towards a finding a self-sufficient niche in a globalized market economy, not a wind down from hardline pro-Russian party apparatuses (who apparently were responsible for a post-unification far-right party?). Many dissatisfied East German youth would support the Euroscepticism of the AfD because they haven't experienced the full promises of prosperity from the collapse of the DDR and the victory of the West-led order.
https://unherd.com/thepost/afd-support-surges-in-east-german... https://www.politico.eu/article/german-election-far-right-af... https://www.dw.com/en/why-young-eastern-german-voters-suppor...
etc...
If your genuinely unaware of this phenomena, then I suggest to do some reading.