This is inaccurate.

Preference for food has been linked to genetic differences and specific genes. For example OR4K17 has been linked to the enjoyment of onions.

If we presume that genetic structures differ in races (which is not speculative but rather factual) we can then assert there is a strong likelihood that some races with favor specific food groups due to the likelihood of them being genetically predisposed to certain Olfactory Receptors.