Last Wednesday, he hosted Jessica Chastain, and their conversation quickly turned to gestation crates, which are used to confine pregnant pigs for up to 80% of their lives (for more details, see the earlier segments of the show). Chastain casually mentioned that those earlier segments horrified her as a vegan (even though? because? vice versa? the precise causal relationship is unclear).
That revelation prompted the following conversation (around 2:17):
Stewart: Are you really vegan? Now talk to me about that, because that’s a move I don’t know I can make. Here’s my problem: I know it’s bad. I know that the treatment is wrong. But my God —
Chastain: You love the bacon.
Stewart: And cheeseburgers. So what do I do?
Oh really, Leibowitz? Something tells me your God wouldn’t so much appreciate your having taken his name in vein (sic) to excuse your consumption of those particular foods.