hi, have u tried mindfullness, i think the underlying problem is that u had bad experience in ur childhood but it can happen for many child now a days, but u r having these racist thoughts due to ocd, have u tried talking therapy for things happened in ur past, if u had done then u can do some simple things, when these thoughts occur write them in a diary
, for 1 week do this and only write 3 thoughts per day for morning , noon and evening.

now for next week notice that what u do when these thoughts occur, do u tried thought supression/replacemnt, mind control, u criticise ur self, if u do such things try to stop this behaviour and let these thoughts come and go, and see how d u feel now, u will much less distracted by them.

when u did this successfully now do some exposure therapy for this u have to find triggers for next week , what triggers these thoughts, it may be like
1)thinking about ur childhood
2)reading news about child harassment
3)watching some movie having child harrasment

note all the triggers and then expose ur self to these situtions like think about ur child hood more and more until u feel less anxious, read a lot about child harrasment etc.

i hope it will help u