My Irish (mum) and Indian (dad) are racist and hate my bf besause he is arab, what should I do?

I don't think that your parents are racist, I think they have true concerns about how will you fit in his family...and his culture . Muslims can be very strict in many ways and many girls that married to muslims were shocked to find out how oppressed some muslims girls are and how few right they have ...Not to mention the appalling fact that most of the world terrorists are muslims...Doesn't that worry you a little bit?