A portion of your link. To wit:

U.S. Code, Title 18, Chapter 12, Section 231

Section 231. Civil disorders

(a)(1) Whoever teaches or demonstrates to any other person the use, application, or making of any firearm or explosive or incendiary device, or technique capable of causing injury or death to persons, knowing or having reason to know or intending that the same will be unlawfully employed for use in, or in furtherance of, a civil disorder which may in any way or degree obstruct, delay, or adversely affect commerce or the movement of any article or commodity in commerce or the conduct or performance of any federally protected function; or

(2) Whoever transports or manufactures for transportation in commerce any firearm, or explosive or incendiary device, knowing or having reason to know or intending that the same will be used unlawfully in furtherance of a civil disorder;

"Having reason to know". How interesting. Almost as interesting as "intent to interfere" at the head of the statute. Who determines what constitutes "intent to interfere" or "having reason to know"? The FBI's crack mind-reading squad? Ah well, the First goes first, and the Second goes second.

Be careful what you wish for.

Regards--
Mary Anne