The Antichrist only makes sense within the framework of Christian eschatology. Invoking the archetype but reframing it as a secular political and cultural force that opposes AI and technological progress seems like meaningless sophistry meant to grant some greater profound scope to what is in essence just basic anti-leftist, pro accelerationist rhetoric, but which only works with a facile understanding of what the Antichrist is supposed to represent, which is opposition to Christ.
And in that sense, Peter Thiel and Donald Trump fit the criteria far more than, say, Greta Thunberg.
By the way, "Jesus" also has the same issue. That name is used at times to support positions that are explicitly contrary to what Jesus taught.
And even if it was in context to Christianity it has no veracity as the entire argument stands on faith which is fallible.