Making my mother and friends understand that I just don't find black women attractive?

Hey all, I am a black male, age 18 who lives with his mom. First let me start off by saying, I love my mom, she helped raise my on her own, and works hard to exemplify the word toughness and resilient. Normally we get along great, however recently there has been a severe rift between us and my choice dof women to date. I have dated 3 girls seriously in my lifetime, and all of them have been blonde white girls. At first my mom didn't find it offensive, but over time she has made it known repeatedly that she would prefer me to at least try to have a relationship with a black woman. The problem is however, there really are very few black women in my school ( around 2500 kids, probably less than 5 % black), and the ones who do attend my school are really stereotypically ghetto and loud. I know not all black women are like this, but honestly it seems like most are where I live, and that whole entitled and aggressive personality really is a turn off. In addition, I just prefer white women in general to be more attractive. I don't want to sound self-hating here, but I think we can all agree that black women and white women hold their weight differently, and most of them at my school are severely overweight. There are a few who are curvy in the right places, but the vast majority just seem to be taking the curvy stereotype way too far and losing it as an excuse to get obese. The few in my area who are actually physically fit, are either far too obnoxious, loud, or just plain stuck up. I've lost count on how many times I've been called whitewashed or an oreo by them. I know that none of this is a rule, and there are beautiful women of all races, but what I have described is the truth in my area. A lot of my freinds think I'm a sellout, but is it really that much of a sin to just prefer a certain race over another? I just white women to be far more attractive, both physically and respectfully. I can tell my mom is upset, as her husband left her, and she always stresses how black women are under appreciated, which I can agree on, but with such little in the way of suitable choices, can she really blame me? Should I try to go out with one of the bigger and uglier girls and try to see if it works without physical attraction and common interests just to appease her, or should I stick to my beliefs?