Cultural-Encapsulation and Multiculturalism?

To me, after taking multiculturalism classes in college for my degree in psychology it was like 15 to 20 people and it was all women and only three who were not and I was surprised that when I brought up feminism and issues of limited sexual binary thinking (homophobia, internalized homophobia, transphobia, genderqueerphobia and intersexphobia) I was attacked and challenged especially about feminism which some said was not even needed anymore. Likewise, they seemed to feel they were being multicultural just focusing on race. And one man the only person openly gay started to support me some but on homophobia but even he had not heard about genderqueer; though he was open to learn. What I started to think is one cannot truly be multicultural unless they are culturally multiple and even then we must realize we are often culturally encapsulated and thus not only must listen and learn from others of other cultures, subcultures, or countercultures, we must see we may even if unintentionally be culturally biased in our thinking or approach to multiculturalism.