Can someone ELI5 how this isn’t recognised as a terrorism?

Notwithstanding this flood of official condemnations, the authorities do not appear to be in any hurry to bring the perpetrators to justice; only one person was arrested in the aftermath of the attack, and subsequently released. Settler impunity has long been the norm: according to data from the Israeli human rights group Yesh Din, 97 percent of police files opened into cases of settler violence since 2005 have been closed without convictions.