My girls parents hate me racially and she does not make up her mind?

All right first off i d liked to start with my girl's parents! Me and her have dated for about 4 and a half years. Behind her parents back. More of a Romeo and Juliet type thing they were ok with us being just friends but when they found out we were together they had a "talk" with me. To them im nothing more then dog they told me that there whole bloodline has been Vietnamese and that they want to keep there blood line pure of filth.Well They said id be a disgrace to their bloodline because im half Japanese and half mexican. I dont know how to fix that with them. But My second problom is with my gf. Now she is extreamly religous and was raised up to all ways listen to her parents but thats the problom she listens to much. She never makes her own choices and dies what they think is right for her well... She tellling me her parents her talked about me and that we should only stay friends.. and she tried to tell me that we should only stay friends.. WTF... Ilove this girl with every bit of my heart and i was thinking about proposing to her.. But idont even know if i should stay with her i mean i get she said tryen to just be friends because of her parents but i dont think i can stay with someone who willing to throw away everything we have because she cant make her own choices and live her own life and lets her parents make and live her life for her... so tell me should i stay with her and if yes what do i do with her parents hating on me about race..?