All_Over_RSTL;DR?
The bill prohibits U.S. persons engaged in interstate or foreign commerce from:
requesting the imposition of any boycott by a foreign country against a country which is friendly to the United States; or
supporting any boycott fostered or imposed by an international organization, or requesting imposition of any such boycott, against Israel.
https://www.congress.gov/bill/115th-congress/senate-bill/720