Nimnim
The Nim
There's probably a good argument for downplaying all terrorist attacks. If the world reacts with a shrug and moves on with life as normal the effectiveness of the attacks goes down. It's like engaging with a toddler having a tantrum, if you ignore them and they don't get the reaction they're looking for they eventually stop throwing tantrums. Same argument for not using the name of mass shooters in news coverage. No fame for the perpetrators.
I would say saying an attack or event happened so that people can be aware and check to see if any loved ones were influenced directly is fine. Details like the perpetrators name or expressed agenda through manifesto or what not being left out is good. Doing both of these are responsible "unbiased" journalism in my opinion. I put unbiased in quotes as withholding the perps name or reason has a bias behind it but it's a bias that removes the renown that some might seek by doing the same. A grey area unbias I think, as long as the information is able to be found with reasonable additional searching (Probably a local government police blotter or whatnot, just a step further than announcing outwardly to the public but still available).