Depends.
Prejudice means to pre judge, so if the assertation is middle class white women can't, then yes it is (also sexist and possibly classist), if its an observation that middle class white women find it more difficult to deal with racist bullying or abuse amongst children then no, since the judgement is made after the fact.
Prejudice means to pre judge, so if the assertation is middle class white women can't, then yes it is (also sexist and possibly classist), if its an observation that middle class white women find it more difficult to deal with racist bullying or abuse amongst children then no, since the judgement is made after the fact.