I think Judge Napolitano knows the law better than you do. If you are going to question his facts, you might want to read the law yourself first:
https://www.law.cornell.edu/uscode/text/52/30121
Don Jr. doesn’t have to be a government employee, or even an official member of a campaign, and the person offering the thing of value doesn’t have to be an official representative of a foreign government, in order for it to be illegal.
The meeting was not with a foreign national but with a dual citizen. No crime.
The first is the prohibition against foreign contributions to U.S. election campaigns, which you've cited correctly there. The case against Trump Jr. in this regard is very weak (or non-existent) because that law could not consider most forms of information to be a "thing of value" by any stretch (i.e., it's not a published work with a dollar value, or information subject to copyright that is worth a lot of money to the holder of the copyright).
The issue the judge seems to be addressing is the legal requirement for anyone applying for security clearance to report their contacts with foreign governments and government representatives (not unaffiliated individuals, to the best of my knowledge).
The link you sent me to describes restrictions on political contributions. I don’t believe that giving someone a heads up on political dirt on an opponent to fall under this.
I would more quibble that information, when true, is not a “thing of value” under this statute. The wording of the law is clearly referring to monetary value.
Judge nappy head is a liberal lying fraud—A gas-lighting guinea.
Fox is a full of them. Pull till ya hear a pop.