They hate race mixing and how children have cause to grow up and identify as mixed and get sucked into all sorts of "anti-White bs", even if the dad "looks White". Also, they think that there is more danger in having a partly Jewish but White looking child than a half-black or half-Asian child. because the latter two aren't "anti-White cults" (!), even if the children end a White lineage forever. The is the fucked up mentality of a white supremacist.