Am I wrong?

A few days ago was my sisters wedding and during the reception we had a mix of songs in different languages. Prior to the wedding I helped pick out the songs. My sister even brought in belly dancers and a dance group. There was a DJ and because I knew the list that he was playing I wanted to put a song on a lot of people were requesting but it wasn’t in English. My sisters mother-in walks up to me and starts yelling saying we are not allowed to make requests nor come up to the DJ and ask for a song to be put on. She said it in a very rude way, I tried to explain to her that I helped pick out the songs and if the DJ could play the one that everyone was asking for. She wouldn’t even let me explain myself and she just put her hand next to my face and said stop it. I froze because I didn’t believe she talked to me in that way so I just tried to keep my cool. 2 other people walked up to her asking the same question and she said yelled at them also. After that a lot of people got up and left, after that I went up to my sister and asked when the wedding was ending because I wanted to go. I didn’t want to make any issues with her mother in law. I told her nothing is wrong but I just want to go, her mother in law walks up to my sister and says stop playing victim. I looked up at her and said but you were the one yelling. She then said it’s my sons wedding not yours and it’s there list not yours. I told her I’m just asking a question that’s all, she says we have been playing songs all night and my son also needs to be visible. I didn’t know that they had picked out the songs for the night and no one was allowed to request. I told her I had no problem and she was claiming that I was being racist. My brother in law stopped it and said his mom wasn’t wrong and that I needed to stop right now. After that my other sister grabbed me and told me to just walk away from her. I did so because she yelled at me in front of everyone.

I then decided to just calm down and help clean the reception, after about an hour my husband asked if we could go bring them to the hotel and beep in our cars (it’s a tradition), my brother in law said no he wants to be alone, I tried to explain the tradition and then he gets angry and says no. My sister brings it up and asks about it again and I am telling her about the tradition. Right as I was talking my brother in law interrupts me says I have been trying to explain things all night and that I just need to stop and take no for an answer. I said I’m sorry and walked out crying. Am I in the wrong? Should I apologize?

Edit* thank you for commenting and yes, I will apologize for overstepping my boundaries. They had a list and told me to pick the songs, so I already knew what was on it. I didn’t know that I wasn’t allowed to ask for another song to be put on. My intentions were never to cause any issues and I will definitely apologize.