Now they're adults, and have kept their interest in dweb technologies, but have come to see "dangerous speech" as a huge problem, and are waking up to the realization that their technical interests and goals would enable these kinds of things. And they're not happy about it, or at the very least are experiencing cognitive dissonance. But that was always the case, and for many, they were the unsavory people in their youth that the older folks were saying were participating in dangerous rhetoric and ought to be silenced or investigated, just like they are saying now about people who are saying things adjacent to things which are illegal.
At the very least we should seek consistency. If you support decentralized technology for speech, you should be happy with the net benefits and net harms. The alternative is the status quo. Arguably the spirit of the internet was not to have what we have now.