To flip it around for the USA, imagine the LA Galaxy having a Thanksgiving dinner (well that's hard to imagine but stay with me here) and a couple of foreign players refusing to partake of the turkey.

That would raise no eyebrows at all, because many people don't eat meat at all.

Years ago I took a course called "Cross-Cultural Communication" and the teacher said not to expect people from other cultures to like our dishes that blend fruit and sugar like Apple Pie... she said that in many countries that's considered disgusting. So if the foreign players skipped the traditional Apple Pie that wouldn't surprise me.

I picked out the traditional Thanksgiving dinner because it's the one meal of the year that emphasizes native foods like turkey, yams, pumpkin, and maize, things that a foreigner might not have been exposed to.

Likewise in many cultures people don't eat cheese or any other dairy products, indeed all adults being lactose intolerant. (Not that cheese plays a role in the traditonal Thankgiving Dinner but we eat other cheese-based things like pizza).