Maybe there is another video showing a crowd of people in front of the car while it is moving, but the video presented by The Guardian doesn't support their description of events. Perhaps you could be so kind as to pause the video at the point where the car driver is forcing his way through a crowd*, and make a screen grab, just so we all know what you think the supporting evidence is.
Maybe this is a matter of language and that we don't quite use prepositions in the same ways for some subtle things. So let's be clear:
The driver was driving his car *toward* a crowd of people.
The car clearly slowed at some point as it came to a stop before hitting anyone. I don't have a history of the speed, so I don't know when the deceleration began.
Given the activities on that street and around the corner (the intersection through which he fled) I suspect (but don't know for certain) that the street was closed to traffic. (There were cars parked on the street, but streets are often closed with cars parked on them that are effectively trapped until reopening.)
Even if your intent is *not* to ram people in the street with a car, driving toward a crowd like that is quite dangerous. Any small mistake or miscalculation in applying breaking or slipping off the brake pedal could cause a collision with the pedestrians.
He entered the street moving fairly quickly for a pedestrian filled environment. I'm not saying he was moving "very fast" as the cars speed seem to be roughly the normal speed for a street like that under normal circumstances. Even if he had a legitimate reason to travel down a pedestrian filled street (like to return to his apartment's parking garage) he should have traveled down the street much slower from the start.
The street he drove down is fairly level (the cross streets go up/down a steep slope) and all of the downtown Seattle streets are on a rectangular grid, so he either drove down the street trough multiple intersections, or entered just out of frame of the earliest of the videos. (I haven't looked at the one specifically in the Guardian, but there are only about 5-6 total videos circulating so I've almost certainly seen that video.)
There were people running after him and throwing things at his car to get him to slow down. This may have legitimately frightened him.
He had a gun in his car or on his person while driving down that street. When confronted by the man at his window, he pointed that gun at him and it went off. The firing of the gun may have been an accidental discharge, but he made the choice to point the weapon toward the man outside his window. If I'd accidentally entered that street unaware that there was a crowd of people at the next intersection, I might have slowed down in a similar fashion and been frightened by the thrown things and people running at me, but I certainly would have been quickly and loudly begging forgiveness for my mistake. (I would also be unarmed.)
When he exited the car, he held his gun out in a position ready to use it, roughly waist-high and pointed level while rounding the back of his car. I don't know whether his finger was inside the trigger guard or not, but if it was, the muzzle was potentially pointed at people. (Since he'd already fired it, I doubt the safety had been reengaged in those few seconds.) Before entering the crowd at the intersection he lowered the gun, but kept it in his hand.
The gun's magazine was strapped (rubber bands, tape, but something blue) to a second magazine. This sort of configuration is used to avoid fetching a second magazine to reload from a pocket or belt and speed reloading when the first is empty. The magazine also appears to be longer than the grip of the pistol (or there would be no place to tape on the second one) indicating it is high capacity. I don't know if there is any standard operational usage of strapping magazines together like that in the police or military.
At some point before emerging from the crowd into a gap between them and a line of police, he placed the gun in his pocket. After emerging from the crowd he raised his hands and surrendered. While doing so he told the officers that he "had to shoot" (or something to that effect) someone who was attacking him (or perhaps his car).
So here are the questions to which we do not have answers:
1. Did he pass a barrier or other indication that the street was occupied? How far should he have been able to see the crowd in the street? (was there a small rise that blocked view?) How fast was he driving at each point and how much of his available breaking capacity?
2. Why was he armed? Is it a legal weapon and accessories (magazines)?
3. Did he intend to ram his car into the crowd? If so, did he chicken out? Did the "attackers" distract or deter him?
4. Did he intend to shoot into the crowd given that he'd come with ample ammunition? Did the gun firing at the man at the window disturb his plans (shake him up) such that he lost his nerve?
Most of the first two questions are facts that have yet to make it into public information. The second two are about motivation. It's entirely possible that he only planned to park near the protest and confront them using the gun only if needed to protect himself from the "violent Anti-Fa hordes" (hence the large ammunition supply), but his plan went astray when the protestors tried to defend their group from an approaching car and his gun "self-defense" shot someone. We don't know yet and some if it we may never know.