Israel should boycott boycotting countries or companies if it can with tecnolagy agriculture medication hi tec whatever else it can tit for tat

They can urge as much as they want.

This provision is essentially symbolic (to throw a sop to the Zionist lobby) but meaningless. President Obama has the power and discretion to ignore the anti-BDS provision, and be assured that he will wisely and morally avail himself of this discretion. BDS is here to stay and strengthen.

sign a bill that harms US.

what about an Anti-Vatican flag legislation in Jerusalem, Israel ?

USA laws do not function outside the USA and any attempt by the USA to force other nations to bow to USA demands will lead to trade wars where USA companies will be the big losers. There are many nations that would love to have a "plausible" excuse to throw USA companies out of their country so local companies could have the business. Any punishment by the USA would simply void trade agreements s and get the USA hauled into the international trade court.