I agree that the desecration went beyond a motivation of simple robbery. Robbery can be done "rationally" (so to speak) by removing objects which have resale value -- there's no reason a mere theft would involve trashing, smashing, and acts of apparent contempt.
A wise friend once told me that you can surmise demonic involvement when people do evil things, not for personal enrichment, convenience, pleasure or comfort (which would be fully explicable in natural terms) but, so to speak, "for the sheer hell of it." Those who desecrated this church are proving the existence of transcendent evil.
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What is the difference between evil and evil that is transcendent, Mrs. Don-o?