So he was a right wing extremist who murdered several innocent people. The parent was saying that left wing extremist attacks aren't nearly as prolific. Edit:

So he was a right wing extremist who murdered several innocent people. The parent was saying that left wing extremist attacks aren't nearly as prolific. Edit: on further thought, no motive for the attack was established. This seems more like an act of random violence fueled by rage, rather than an ideological attack.