HBCU's VS. Majority Universities?

HBCU's VS. Majority Universities?...... This is a constant argument brought up in today's society. I immediately wanted to research this topic when i saw it. I constantly argue with my friends who attend majority universities. They always bring the argument that my school isn't diverse and that my education is less that standard. They always say that we won't be able to communicate with the fast diverse world. At the end of this research project I hope to be able to convince my friends that HBCU's are diverse and teach higher than standard learning. So i ask you , what do think?