Why are some people against mixed race relationships?

I’m not referring to people who don’t want to date outside their race by the way I’m referring to people who don’t like other people dating outside their race and think it’s bad if they do.

My step dad is an Asian guy and my family was very prejudice of his relationship with my mom. Asking if he even speaks English (stupid question) and if he’s just coming to america to get a green card?

Which doesn’t make sense for them to ask cause a lot of my family are first generation immigrants themself (my mom included) ?

Apparently in the US at least, the approval of interracial dating is at a new high of 95% so I’m wondering why the 5% are against it?
Why are some people against mixed race relationships?
Why are some people against mixed race relationships?
Post Opinion