Realtors do not describe communities by racial or ethnic categories. There are several protected classes under Fair Housing laws, and this definitely falls under Fair Housing. Any person, regardless of race or ethnic background is entitled to purchase a property if he/she is financially qualified.
Depending upon what your purpose or definition of community attribute, that might also violate Fair Housing laws. Attributes such as tree lined streets, winding roads, close to beaches, close to public transportation are acceptable. If you are looking for data which defines the local residents, it is not information that a Realtor can legally provide, nor should they.
In addition to the fact that violations of Fair Housing laws carry severe consequences for real estate agents, the truth is that the vast majority of real estate agents personally and morally believe and support equal housing opportunities. I noted that you were asking how your church members may be able to confront any problem areas. While your question is, most likely, well intentioned, please be aware that sites that provide demographic info may be able to better provide this information.