The claim is made on this website that a non-Jew is allowed to engage in a central element of the oneg of a se'udah that one might think is reserved for Jews.
you don't have to be jewish to love levy's rye bread
Are there halachic discussions about whether it is or is not appropriate for a non-Jew to enjoy that lechem? Does this claim have any textual basis and is it the position of mainstream yahadut?