I'm not a fan of U.S. law as it currently stands, but not enforcing laws as a matter of course (i.e. not an act of protest) pretty much demolishes rule of law. That sort of activity goes hand in hand with corruption and failed states.
Selective enforcement is a thing. Lying to the FBI in the course of an investigation is a crime, and because the lie can be about something the FBI already knows, it's frequently used as a proxy for actual crime.
What happened to retired General David Petraeus was a pretty good example of "justice for your friends". Lying to FBI agents, actually giving away classified documents, and he pled to one misdemeanor and got two years probation[1].
It's not like they didn't have evidence of the False Statements charge.
