Sure. If your next door neighbour hires a van and drives 150 miles to purposely mow down innocent pedestrians, and you’re not surprised, something is wrong.
First reports here in the US seemed more hesitant than usual to speculate about causes, almost making it sound like an accident. That does seem to fit the “it’s not terror if “our” guys do it” narrative.
However, today’s Washington Times, the conservative newspaper favored by anti-foreigner types here, does explicitly call this attack terror, to their considerable credit.