My cultural imperialism isbetterthanyour cultural imperialism

Afarensis, as usual, has a post to make one think. He links to a story
about evangelical Christian Nigerians try to free themselves from old evil gods by burning their ancestors' ritual objects.

A)Evangelical Christians don't have a monopoly on iconoclasm or idol-destruction. Various groups argue about whether they are the same group or a different one while doing it to themselves eg Cromwell, winners of all kinds do it to losers of all kinds -- enough.

B) Although Afarensis suggests that the preacher at the center of this episode is arrogant, and he probably is, suppose that many of these culture-destroyers really believe the destruction will bring them salvation in this world and the next.
Is it cultural imperialism to suggest that the native people don't know what's really good for them and need to be rescued from their ignorance (which, I cannot say enough, need not be of a Christian flavor to burn things up)?

C) We have heard some concern about repatriated objects in the US being not only removed permanently from the larger community's study but also allowed or encouraged to decay (and how about the curation in Bagdad, eh?).
How would the US scientific and/or anthropological political community feel about a conversion to whatever iconoclasm (what if they had relatively good proof that certain objects really truly attracted hanta virus, a fine provable form of damnation) in a tribe seeking repatriation of ancient goods? Would it make any difference if the conversion also affected some of the scientists?

D) Whose cultural heritage is it anyway?

Personal note: It is hard being a liberal and wanting to steal things and lock them up (also shoot selected individuals and censor just a few books). I figure if preserving idols is the worst thing God can get on me I'll be very surprised.