Just got back from workfagging and had to drop this thought I had while there.

RJ was likely involved in 9/11 fuckery. c.f. steel shipped to China for recycling. Other shit?

As mayor, he had close contact w/NYPD commissioner + others on the force. This means that when Wiener laptop recovered , he was contacted and has DEFINITELY seen it.

As per description given by others who've seen it, the content of the vid[s] red-pilled him in one fell swoop.

He's been looking for a way to expose what he's seen ever since. Joining POTUS team gives him an edge.

All speculation , but seems highly plausable.