Chinese food

So i was at the Chinese resturant today chowin down on the all u can eat buffet, ya know a typical saturday night for me. Me and my buddy we sittin there and i noticed the waiters talkin chinese and looking at us and laughin. They were probably laughing at the fact that we each ate so much food that we couldnt move....we were also loud and obnoxious. It made me kinda uneasy becuase i didnt know what they were saying. i know that in America there is no official language and they have the right to speak whatever language they want. I agree with both of these things but it just frustrates me that i dont know what they were saying and if they were talking about me. I think that this is cuased by me being in the majority as far as language goes and i feel insecure when i dont feel that others are conforming to my language. Its something i need to work on.
The food there was great, but i noticed that they were serving chincken wings. With a laugh i pointed them out to my friend and he sayed that he wouldnt be trying those and laughed. I replied with a "yeah STICK WITH WHAT YA KNOW" and laughed. I then realized that what i said was kinda offensive to them. I mean i sometimes make pasta and im not from italy.....so should i be laughed at. NO. It seems this class is making me see my own faults as well as the faults of society