I'm not sure where this comment is even coming from. Whether you agree or disagree with their agenda, these are all inherently movements of civil-disobedience, seeking to up-end a cultural status quo. Upending the cultural status quo is inherently short-term destabilizing even if it improves long-term state stability.

That said, BLM is clearly about finding a pareto improvement to individual well-being in the context of systemic racism, Antifa is as anti-government as the so called "Patriot" movement, and Communists value fairness over maximal well-being. Maybe I'm dense but I don't see how these three collectives are at all inherently related.

Organizations working to defend the State (like DARPA) are dedicated to both the short and long term survivability of the State. Any activist movement, right or left, is definitionally not aligned with the interests of the short-term status quo, even if they may well produce innovations that promote long-term stability. That said, those goals don't have an impact on the output of an R&D organization, except as they allow or disallow diversity of thought within an R&D organization. Any ideology, "left", "right", or "center", sufficiently outspoken enough, can be used to suppress the diversity of thought necessary to recognize/embrace true innovations when they are produced.