Do I tell someone they aren't vegan like they think they are?
I went on a date with this guy who said he was vegan. We decided to cook together and went to the grocery store to buy the ingredients. He bought kimchi which had fish/oyster sauce in it. I pointed it out to him that the kimchi wasn't vegan because it had that sauce in it. He said "yeah I don't look at the labels when I buy them when there's a possibility of things not being vegan because then I'd have to avoid the brands I've been using from before I went vegan.". Then he got angry that I made him aware of the fish sauce and put the kimchi back angrily.
Obviously there's no second date but should I tell him that he's not vegan or just let it be?
Edit: because a lot of you are telling me not to meet an angry person again. I already said that there's no second date. I don't think you guys are understanding my question. I don't need dating advice. I want to know if trying to gently push someone like this towards veganism in this situation is good or not because I'm afraid I might cause more harm than good.
Edit #2:
Thank you all for participating. After reading all the opinions, I've decided that if it comes up naturally again (if he asks me again why no 2nd date) I will gently tell him the reason. And someone in the comments section helped me frame it in a nice way without being judgemental, so I will be doing that.
The things that stood out to me from the comments were:
It could go either way, we can't predict the future. Personally, I'm someone who believes in trying my best rather than letting a situation be.
I have nothing to gain from this but the animals stand to gain. After all, we chose the path of veganism because of our love for animals.
Disabling notifications on this post. Peace! ✌🏽