blaze of gory
When a demented person decides to commit suicide in a public way that includes the horrific murder of other human beings, the horribly elevating phrase 'blaze of glory' is often used to describe the action, but it needs to be replaced by 'blaze of gory.'
That murderous psychopath (whose name we should never say and never publicize) just had to go out in a blaze of gory, which resulted in so many senseless deaths.