The G&M editorial board is suffering from a severe case of Trump derangement syndrome....everything negative that happens in the universe is Trumps fault, no matter what.

As for the failure of use of what the G&M considers to be the right adjective to describe the tragedy...

No one knows this man's motivation to commit mass murder...we don't have the foggiest idea as to his motivation , nor do the editors of the G&M.

The authorities are busy going through his computers, phones and money trail, to try to discern his motivations ...ISIS has claimed that they guided him, they say that they will offer evidence...I'd be very surprised if it was involved despite its eagerness to take credit, but who knows.

Once the facts are gathered and analyzed ( it's only 48 hours)  all will be revealed , and the appropriate descriptive adjective will be used.