"...who is stopping you from discussing that?"

2 things are stopping people...

1) Many "PC" Warriors will spam "flags" to ensure comments are removed as "not civil" to control the narrative.

2) Maybe you noticed that the media at large still hasn't mentioned his name?  And that they waited and waited before mentioning any part of his background (conveniently only saying "Britain-born" with no reference to ethnicity)?  Those are not coincidences.  More spin to control the narrative which is to deliberately avoid mentioning any names of Arabic origin when they are offenders... but note that the article DID find and name drop the 2 Arabic names which were victims/government.  

All media spin...