Unleavened bread at communion is symbolically important (sinlessness of Christ); alcoholic vs non-alcoholic wine is incidental

Mike argues that whether grape juice is fermented is not the theologically significant factor -- the wine is symbolic as grape juice (blood), not because of its alcohol content. By contrast, the absence of leaven is specifically symbolic of Christ's sinlessness, making unleavened bread theologically meaningful. Romans 14 (those who abstain from alcohol still take communion) proves alcoholic wine cannot be required.