Separate or mixed holiday dinners?

Da

My partner and I were having an argument tonight and he thinks we should have my family and his family all together for the holidays. He says if we don’t our daughter will grow up thinking they don’t like each other. I think it’s normal to have one dinner for your family and another dinner with your partner’s family. So who’s right? How do you do your holiday dinners? Do you think my daughter will be scarred from doing two separate dinners??