> In other words people who don't know the difference between race - a biological phenomenon - and ethnicity - a social phenomenon.

No, people who recognize that despite the conceit that race is a “biological concept”, the identification of race (both ascription to others and self-identified) has always been driven by the same sociological phenomon that drive ethnic identity, and that, in practice, the concept of race operates as simply a broader set of ethnic categories, which is why identification of what races exist and how people are identified as being in one race or another vary not only between cultures, but within the same cultures over time.

Well its at very least contested whether its a biological phenomenon. Its certainly not a genetic phenomenon and hasn't been treated as such since the mid-twentieth century

Ethnicity is almost always a biological phenomenon as well.

Race and ethnicity are simply larger and smaller group categorizations of humans, both with reasonably accurate biological tests.