A culture is a set of ideas and practices that constitute a general way of thinking about the world and a typical way of life. Ideas can be correct or incorrect. Practices based on those ideas can be conducive to human life, or destructive of it. In short, ideas and practices can be objectively good or bad for people.
The judgment of certain cultures (ideas and practices) as better than other cultures is entirely separate from the phenomenon of racism. Racism, broadly, is the idea that one’s race, genetics, or ancestry is a determining factor in the content of his or her consciousness. Consequently, it is the idea that one can determine something about what someone believes by studying his genetic or ancestral lineage. This often takes the form of moral value judgments based on race or ethnicity.
There are some cultures that have historically been associated with large numbers of people in certain genetic groups, such as “Jewish culture” and “American Black culture.” But there is no necessary connection between genetics and culture. Anyone can be a part of any culture, according to his education and personal choices. Thus, a judgment of “American Black culture” as inferior to “Chinese-American culture” is not a judgment of an African lineage as inferior to a Chinese lineage. It is simply an acknowledgment of the fact that the cultural ideas and practices that have traditionally been accepted by large numbers of African-Americans are less conducive to human well-being than those that have traditionally been accepted by large numbers of Chinese-Americans. (It is this difference that is reflected in vastly different crime rates between the two groups.)
The irony here is that it is actually racist to consider a person’s culture to be determined by his genetics. Thus, it is actually racist to consider the evaluative ranking of cultures “racist.”