If Angela told him when she was invited, he could maybe have made sure to provide something vegetarian, but when you have a unique dietary choice, it’s on you to communicate it.
I eat a keto diet. People who know me are usually pretty thoughtful to provide a low carb option when they have me over, but I don’t get angry with someone for not going out of their way to guess at my dietary choices.
And after Diwali, it becomes clear that Angela plays the vegetarian card to justify outrage even when it’s not justified.