Doesn't DL also code share with El Al, and also fly to Israel itself? So by boycotting them your friend is committing anti-Semitism by his/her own logical standards.

Also, does Israel easily grant entry to any citizen of Saudi Arabia who wants to visit? If not is that also discrimination? Should all code shares for all airlines be subject to this same asinine boycott standard? If a nation doesn't allow gay marriage, is an airline that code shares with them homophobic? What about a code share with an airline in a country that slashes and burns mass quantities of irreplaceable rainforest so their beef is 2 cents a pound cheaper? Are all participating code shares anti-environment? Airlines in countries that skin millions of animals alive because they claim it costs too much to kill them first? Airlines from countries that wipe out millions of sharks each year and throw them live and finless back into the ocean to die just because they believe their fins possess fairy tale magician libido secret powers? Are those pro animal cruelty airlines? Airlines in countries that are pro abortion? Airlines in countries that are pro choice? Will all airlines in all countries with large scale human rights issues be held accountable, all of the time, or only some airlines some of the time will be held accountable to the populist cries for boycotts?