While visiting in San Antonio,Texas I was corrected for?

I think your friend was out of line. It's ok to be informed of what they prefer to be called, and if true, do so if the subject comes up. You have no desire to offend. But in regard to the clothes, she was very wrong to take you and buy new clothes. The Mexican (Latino) citizens open their arms to 'all people's and their culture. They would not be offended by your dress. Your friend needs to lightenup.