What makes you so absolutely sure? Just the fact that they haven't released the records?
In that case, you are making an assumption only.
Do a search yourself and you will see. Do you know how to do a search? If not I will help you. Type 'Arafat homosexual' or 'Arafat gay' or 'Arafat pedophile' or 'Arafat AIDS'. Then you will see.