I understand your feelings, Ana, the injustice, the blind stupidity, the unreasoning prejudice. Your anger is certainly warranted.
A suggestion for your consideration: your self-worth is determined by you, not by anyone else. If you are sure of your worth, confident in who you are without needing outside confirmation, then you are impervious to attacks of this nature. You have the strength within you to remain calm, knowing that no assault can take you down. And from that pervasive calm, you can reach out to love your parents unconditionally... that is, to keep the lines of communication and love open from your side, leaving it only a matter of their choice whether to return your love and open heart.
Wishing you serenity,
COMF