AITA for not apologizing to my behaviour

My sister and mother are very upset with me because of my attitude towards them lately. They are upset and feel disrespected because I am do not see there view point and putting more importance on my wedding day than the situation in all.

First off, I was getting married to a woman of a different race (I am white). My mom was very upset saying that she is very hurt because she does not understand her culture and she is offended because she feels she cannot say to my partner what she feels without her getting offended. My mom is upset saying she has a right as a mother to talk what she wants about her culture, she is not racist she just thinks they should not be like that. I think thats racist. My sister just follows her (my sister is 37 years old and not married).

Well on the day of my wedding (i noticed not a lot of people showed up) my mom texts me to tell I hope you understand how much you hurt me, I cannot attend my own son’s wedding because you chose to marry someone that conflicts with my views, you chose to hurt your own mother, you will regret this and how you are treating me. I just ignored her. She tells me that she told everyone in the family how I been treating her. I understand that she got people not to go to my wedding basically.

A week after my wedding my mom calls me, I pick up the phone and she tells me because of me she has been sick going to the hospital because of the choice I made. On day of my wedding she said she threw up, and can not sleep anymore knowing how much I hurt her. I told my mom stop thinking about yourself, you always thought about yourself and never me. Her reply was just shocking… “its just a wedding, you make it sound like its your destiny! Can you not see the bigger picture that you hurt me, I cannot live normally because of you because of how selfish you are being, im your mother im always suppose to be first, you cannot even say your sorry for what you have done to us and me”

I just hung up the phone mid way because this is ridiculous. I told my wife she is always first in my life.

AITA for everything here?