Syncretism is the process by which elements of one religion is assimilated into another religion resulting change in the fundamental tenets or nature of those religions.
One example of syncretism is modern holidays, including Christmas and Easter
Cultural syncretism refers to when a group of people share a common culture or cultural trait.
union or unification
Had syncretism not occurred in the Americas, the modern culture would be different because of the different religious beliefs.
shared youth language and argot
syncretism
The combining of elements of two groups into a cultural feature
syncretism
It refers to the Hellenistic process of assimilation of deities (syncretism)
They believed their culture to be superior
Syncretism is the attempt to bring different beliefs together. In Southern and Central America, the indigenous persons retained many of the practices, beliefs and customs of the indigenous religions when nominally accepting Catholicism.
I think 'syncretism' might be the term you're looking for. How about "blasphemy?" :)