Syncretism

"An amalgamation or incorporation of traditional and introduced alien culture traits. In Southern Mexico and Guatemala, the Maya Indian combination of mutually exclusive indigenous religious and European Christian beliefs to create a new composite religion is an example. Syncretism is often a psychologically more satisfying alternative to rapid acculturation that totally replaces indigenous cultural beliefs and customs since one's own cultural identity is maintained". http://anthro.palomar.edu/tutorials/cglossary.htm