Asking for sincere advice: my parents reject the revert I want to marry

Assalamu Alaikum. I’m a Muslim woman in my late 20s from a Pakistani family living in the West, and I’m really torn - I’d appreciate honest, straightforward advice. I’ve been in a relationship with a man who reverted to Islam. We met three years ago in 2023 when he wasn’t following any faith, though he comes from a Sikh family. His family never practiced, and he’d had doubts about religion for a long time. He researched different beliefs to find what made sense, and Islam was the one that resonated with him. Early on I told him that if we were to marry it must be as practicing Muslims. He’s not one to pretend - so he started learning seriously. In late 2023 I went for Umrah and prayed a lot for Allah to guide him. In November 2024, during a very difficult period in his life, he sincerely embraced Islam and said the shahada at the mosque. He already fasted and observed Ramadan even before formally reverting. Prayer is still a challenge for him as a new Muslim - learning the salah has been hard - but he’s committed to improving and keeps trying. He’s honest, has good character, treats me with respect, and we’ve discussed marriage with the intention of doing it halal and raising children on Islam. Like many new Muslims, he still struggles with some habits he knows are wrong, but he understands they’re haram and truly wants to stop. The problem is my family. They refuse to accept him or his reversion - not because of his character or intentions, but because of his background. His parents aren’t Muslim and he comes from Sikh roots. My parents say that alone will “ruin my future” and that my children will be “corrupted” by his family’s culture. They’ve never met him, never asked about his manners or faith journey, and they won’t try to understand. Islam teaches that even a small amount of faith matters in Allah’s sight. Guidance is from Allah alone - not lineage or culture. My parents dismiss his Islam because he’s a revert still learning, but everyone starts somewhere and iman grows. For them, him being a revert from a non-Abrahamic background is enough to reject him outright. They’ve given me an ultimatum: choose him or choose them. I’ve prayed istikhara and pleaded with Allah for clear guidance, but I’m still unsure. He’s been patient, respectful, and supportive the whole time. He has never tried to push me away from my family; he actually wants their acceptance. My family accuse me of choosing a man over them. I feel I’m choosing someone who treats me with loyalty, respect, and sincerity. I wish they would at least meet him and judge his character. I’ve tried to explain that this is cultural prejudice rather than Islamic teaching, but they won’t listen. They say if I marry him they won’t be able to face people and that I’ll bring dishonor. They call me selfish and say he isn’t worth it; they even threaten to tell others I ran away. They’ve threatened to cut me off for choosing a halal marriage, said hurtful things like barring me from funerals, and accused me of bringing curse upon myself. I’m trying to do the right thing. We’re trying to make this halal. But it feels like they’re forcing me to choose between two parts of my heart. I don’t want to lose my parents, and I don’t want to give up someone who truly loves me, is loyal, and wants to build a faith-centered home. I’m not looking for empty comfort - I want clear, honest perspectives: Islamic, ethical, and thinking long-term. If you were in my place, how would you approach this decision? If my parents had raised concerns grounded in Islamic principles or sound reasons, I would take them seriously. But rejecting him purely because of his background feels wrong to me, and I’m struggling to reconcile that with my faith and conscience.