fiance afraid of being rejected by future children

So my fiance is white/Jewish and I am a black woman. Neither one of us are religious so it's not an issue. We are both agnostic. So today he opened up and said he was afraid that mixed kids would reject him as a father. he said he didn't want them to view him as "the evil white man" like society is painting that picture. I tried to reassure him that that wouldn't happen and that wouldn't allow my kids to disrespect their father. afterall it's not like I made the kids alone. without him, they wouldn't exist. I kind of understand where he is coming from. I would feel kind of bad if my kids denied or rejected me and saw blackness as bad. I am not sure how to reassure him that this will not happen. Are there any mixed kids out there? can you weigh in and tell me your experiences?