Shellfish and Mixed Fabrics
A common argument against Christianity by many atheists is the idea that Christians don't follow the dietary laws of the Old Testament. I recently heard one ask, "Why are you not firebombing Red Lobster restaurants for serving shellfish?" and "Why are you not calling for the dissolution of clothing companies that produce garments of mixed fabrics?"
The question being asked is a good one, but it shows a common misunderstanding about the role and purpose of Jesus, known as the Messiah.