Jews are not a race, Mike.
Ethiopian Jews, for example, are Black, as was Sammy Davis, Junior. Judaism is a religion. One may become a convert to the religion, though, over the past thousand years or so, Jews have not on the whole encouraged conversion. It is difficult to catagorize the notion of race accurately these days.
If you are to believe there is in fact an verifiable construct called race available, and there is some debate about that in the scientific community today, it would be unlikely that one would be able to apply the notion of conversion to it with any degree of comfort or reliability.
You might be able to convert from Catholic to Taoist, in other words, but it would be problematic to attempt a conversion from some form of Asiatic folk to, say, some sort of Black folk, especially by simply going through a ceremony.
There are Jews who are Black, Chinese, and Caucasian and possibly other groups and sub-groups of which I am unaware.
To confuse Judaism, the religion, with a race is inaccurate.