I am not. Historically ethnicities and ancestoral lines aligned so ethnic differences and biological differences due to generational mating choices largely influenced by the culture that is a component of the ethnicity are aligned as well. Race is not a biological classification because it is appearance based but arbitrary. Appearance is not the same as biology. A husky appears similar to a small wolf but it might be correct to consider them (dogs) a race of wolves.

The deceptively evil part of the concept of race is, it does not simply differentiate biological features but it goes on to impose a fork at the root of the ancestoral tree where people of that race share the same origin and same differences. In reality biological differences are a result if what a culture considers attractive multiplied by mutations that help people adopt to different environments (e.g.: skin color being a result of adaptation to sun light and vitamin d levels instead of a being a feature that shows ancestoral forks in creation or evolution).

It is simply inaccurate to label people by race but it is useful to impose social evils. But biological differences due to mating and cultural choices are very real and can be examined at a granular level that takes the actual factors for the differences into account instead of the lazy+evil correlation that is the concept of race.

Ethnicity is not what culture you identify with. You don't become ethnically african american because you like african american culture and grew in a specific neighborhood. It is the marriage of culture and ancestry.