There's a huge difference here: you would have a very, very difficult time finding anyone who identifies as a vegan and also eats meat knowingly and willingly.

There's a huge difference here: you would have a very, very difficult time finding anyone who identifies as a vegan and also eats meat knowingly and willingly. However, Christians who don't fit your definition of "true Christian" are a large part of the US voting population, so much that the "No True Scotsman" fallacy seems to apply here. Even worse, if we look at Christians over the last two millennia, especially during the middle ages, the vast majority of them don't appear to be "true Christians" according to your definition.