All I did was stating facts. N there's a thin line between ego n pride, I m proud of the systematic varn vyavastha my ancestors established. May ancestors forgive u for not being able to pull ur daughter out of such unfortunate circumstances. All u can do now is seek happiness in their vegetarianism ,tell others how ur daughter "allowed" u to do her kanyadaan so how grateful u must be to her n how she atleast bothered to seek ur permission. If being open minded means loosing Janeu then I choose to be the last regressive standing.Men in the prospective groom's varna wear Janeu. The family is Hindu, and most of the family is Tamil Brahmin.
I understand your fear and appreciate your advice. Hopefully other people reading this will also get some direction. I will pray to our family God to help provide answers to my family, and may God also provide you with answers and direction, and perhaps an open mind to overcome your ego.
At last, I know this marriage is going to happen anyway n even if u get ur daughter married to a tamil brahmin , her next generation will definitely not bcz the fact that she even thought about keeping her preferences in the way that she keeps same profession above religion makes one think that she is definitely not going to have even staunch Hindu childrens(leave Brahmin children aside), let it happen, let "ur baby gurlll" get married, she's not going towards moksha or not going to contribute for dharma anyway , this whole discussion is a dululu thing.