Fiancés family hates me

I just need to vent I’ve held it in for so long and I just need a place to vent freely. I love my fiancé with all my heart and I do love his family. I sincerely love his family because they are great people. Except that’s it they’re great people to an extent to their extent at least. I’ve always looked forward to having great in laws. Don’t we all just wish that? Like a great vibe with your mother in law and father in law? Idk I just want to be considered as their daughter the way my family considers my fiancé as their son. My mom literally calls my fiancé her son. My father in law hates the living hell out of me because of my religion. His brother hates me for no reason maybe because his father hates me. His mom likes me somewhat but we have a difficult time communicating to each other. I’ve tried getting close to their family although our culture is different and I didn’t come from Oklahoma I try my best to support the football team I try my best to compliment the food. I do everything to fit in and be a good daughter. I be myself but it’s not enough and you feel it. You feel it when you’re not welcomed. I went to the mall with his mom and sister and I felt like I was just there as a wingman because his mom wanted to get closer to her daughter but my sister is so close to me. Except the downside is she’s so spoiled. I don’t know what else to do. I love them they are a fun family, they cook amazing food. I just feel like we’re so different that I will never be enough. I try I really do try. Am I complaining too much? My fiancé is the middle child he doesn’t seem to be important but he’s an amazing person and an amazing son. It hurts to be over there and see him ignored by his own family. I really need help to be strong. What can I do?