This checks the Vegan Bullshit Bingo:
Calling veganism a religion sounds like an attempt at discrediting it as unreasonable and irrational, just to not seriously deal with it. As veganism is based on facts, logic and common sense, it is the exact opposite of a religion. Consuming animal products though, mostly means blindly following irrational traditions and ignoring the facts or refusing them by reasoning: “That’s how we’ve always done it”. That sounds more like a religion to me…