"Hey! If you want to be polite to the customer, then you speak English to the customer in America."
We enter this horrific scene with very little context. The only information attached to the YouTube video is the title "Angy Hot Kebab Girl Meltdown" and the description "Crazy girl has meltdown over Kebabs."
But it quickly becomes clear this isn't about kebabs. It's not about getting green peppers instead of red peppers like she requested ("My kids don't eat green things!"). It's certainly not about the two women speaking to each other in "whatever language" and leaving her out. If it was, then she would probably agree to their suggestion that they make her a new kebab, with red peppers.
It's about being at the point in your life where you have no better outlet for your frustrations than to yell "What are you gonna do about it [the red pepper request]?" at strangers in a restaurant, before pushing your way out the door. Because this is America and you get it right the first time.