You asked why Weiner isn’t investigated by Protective Services of NYC.
That’s a good question, but I think a better one is: Why is the FBI investigating Weiner’s underage sexting at all? Isn’t it a state issue?
If the answer is, “Who cares, it let them see that Clinton was careless with classified info”, I might agree, but then we also have to agree that WikiLeaks release of questionably obtained info was an end-justifying-means boon to all of us (which I do).
Why the FBI on a minor sexting issue?
Possibly the little perv had sexted an out-of-state minor or was found to be otherwise involved contacting an out-of-state minor?