How about none of the above? Charles claims his critics have considered only the above three ad hominem explanations for his omnivorous diet, and ignored his ideas. As we approach 200 comments to the vegetarian dialogue, he's feeling caricatured. Not listened to. As though he's not been given a fair shake. Even Peter Singer weighed in to give Charles the whatfor. Perhaps there's more merit to his arguments than the critics have allowed?
Charles responds to the commenters here. Show a bit of lovingkindness, green team! Really read it.