Would the demonstration on May 1st fall under the Hobbs Act. Because the demonstrators have threatened to "shut down all the ports, railways and airports" doesn't that fall under "Interference of Commerce by Extortion..."unlawfully obstruct, delay and affect, and attempt to obstruct, delay and affect, commerce as that term is defined in Title 18, United States Code, Section 1951, and the movement of articles and commodities in such commerce, by extortion, as that term is defined in Title 18, United States Code, Section 1951, in that the defendant did obtain and attempt to obtain (tangible or intangible property) the property of (victim with connection to commerce) with his/her consent having been induced by the wrongful use of actual and threatened force, violence and fear, [including fear of economic harm,] in that the defendant did (describe defendant's wrongful use of force, violence or fear)".
Organized actvity to "shut down all US ports, railways and airports" falls under RICO laws --- under sections that prohibit actions that threaten the US economy.