I lived in Shepherds Bush in West London all my life before moving to HOP 6 years ago. I promise you the difference is night and day!
This is one incident, let's not blow it out of proportion. HOP is a great, generally safe area.
I personally take no pleasure from anyone getting stabbed, and people should keep in mind as this is local these people's families might read this forum, even if we ignore the fact that we don't know what happened yet.