Desecration of the sacred host
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Myers' justification of his action is fatuous: "it's just a cracker". Even if Catholics regarded the sacred host as a mere symbol, this would be an inadequate justification for showing it disrespect. Remember the episode of Sharp when he realised that he could not describe a flag simply as a "dirty rag"? You simply do not take the sacred symbols of other people and vilify them if you have an ounce of civilised blood in you.
Of course, we believe the "cracker" to be the body, blood, soul, and divinity of Our Lord Jesus Christ. He will judge Myers mercifully for his sacrilege.
Such an incident should prompt us to consider the wisdom of continuing the practice of giving Communion in the hand.