I talk like a white girl.

My Mom was born in Malpaso, Zacatecas. Her people have inhabited that part of Mexico for thousands of years. I remember she told me once that her family had lived in that town for hundreds of years. To this day I have Aunts and Uncles there.
My father is from Guadalajara. This grand city was first established in 1531 by the Spanish. It is named after one of the founders' hometown in Spain. With help from my family and the interweb we traced my Father's ancestors to the Iberian Peninsula of Spain.
I traced the origin of his surname to pre Christian Rome. It came from the Latin word for thorn. My first name is Carmel, it's Hebrew for garden. I'm Thorn Garden, pleased to meet you!
My parents were Mexican by birth and Americans by choice. They came to our country in the 70s, became citizens some years later.
This is the best country in the whole world and I love it. If you don't agree you can go out in a field and sit on it! Whenever asked what I am, I'll always proudly proclaim American!
A few weeks back a customer asked me, what are you? American I said. Well you look Mexican but you talk like a white girl. Oh yeah, well you look like a jackass! Didn't say that aloud but I thought it really really hard!
I shared this with my friend (in the picture) today. She's a born and raised Mexican with light brown hair and green eyes! Not Mexican looking at all!
She agreed, I do indeed talk like a white girl. This is what she said; when I first met you I was confused. You're a tall butch, Mexican / Hawaiian looking girl with tattoos but when you talk you sound like a super girly middle class white girl.
$%#@ ,The only labels that are any good are on food. Leave that shit off of me!
Now I understand that there's such a thing as regional accents but what does the hell does it mean to talk like a white girl?
I need your thoughts on this. I know this could lead to the sensitive subject of race but rest assured I hate you all equally.