Dear def454 : One of the important points in your opening sentence is "involved in the ... community". That is the key point : involved. Community involvement and in the Jesuit tradition, "men and women for others".
The religious affiliation tied to that involvement is something that your personally have to weigh in your application process and when you consider four years of campus housing. Although Jesuit and Catholic traditions tend to be tied together, the pure Jesuit tradition is one focused on education.
The theology core can be satisfied via many course outside what one would classify as Catholic and Christian teachings. One suggestion would be to review the theology page on BC's web site :
Department of Theology - Boston College
Also, with some browsing, you will be able to explore the full theology curriculum, available here :
All Courses - Boston College
Hopefully, this will help show that the theology component is just one very small piece of the Boston College core and that component can be filled through a number of options that will help you explore your own religion, provide other perspectives, or take you in a completely different direction than you might anticipate.