I still do not see him swerve away. Maybe he accelerates some, it's very hard to say. I still think he appeared to have been heading into the crowd at too high a speed when the car was first hit.
This video shows the incident broken down to slow motion and some illustrative pics.
There is little attention paid to the driver as he approaches and he is going slowly, then his car is struck at 00:47, and the car veers right at 00:56.
Another interesting pair of pictures are at 2:07 and 2:36 in the video, the first is a closer shot of flagboy hitting the car and still there is no panic in the crowd. The PRECEDING pic is at 2:36 and shows the situation before flagboy hits the car, and notice that the DRIVER HAD HIS BRAKE LIGHTS ON.
From that point he accelerates in a short distance to a speed that caused two parked cars to slam forward into the crowd.
It seems pretty strong to me that the driver panicked, spooked by flagboy.
Still he is at least guilty of manslaughter and failing to control his vehicle.
Don't take this as me being completely confident, but here's my take.
First, I still don't know if the car was actually struck by the guy with a flag (although it's nice to have a good picture to see that it WAS a flag, I thought it was a bat from the first video I saw). Certainly he tried to hit the car, but it was moving forward and you just can't tell if the flag actually hit. Later on in the video you linked, it shows a scuff mark on the bumper and indicates that was caused by the flag, but it looks to me as though the scuff was already there and the flag would not have hit that spot.
Next, the pictures of the guy with the flag and the car's brake lights. I had already seen the car's brake lights on momentarily in another video. That was a bit up the road from where the flag guy tried to hit him, and I don't see how that makes the case that the driver was fleeing. The driver at least tapped the brakes a ways back, then did NOT brake again after. So he was at least coasting, if not accelerating, before ever getting to flag guy.
When the guy with the flag tried to or did hit the car, you absolutely can see concern, and perhaps the beginnings of panic, in some of the people. A number of faces look worried, and a woman in green pants and white t-shit in the path of the car looks to be trying to run out of the way. I'm not saying that explains the flag guy trying to hit the car; he might just have been an ass hole.
I do see a small swerve to the right in the video. However, it is such a short turn and immediately corrected, I don't know that it can be seen as evidence of panic. Was the driver in control enough that he could recover from a panicked swerve a fraction of a second after he began it, yet not in control enough to stop the car? Despite the label in some of the pictures that claim the brake lights came on after flag guy hit the car, I think it is pretty clear that what is circled is actually a glare off the bumper. You can see it in the picture at 2:27. The positioning of the light spot is not where the brake light should be. So, what we seem to see is a driver make a minor course correction without any attempt made to stop. If this were truly a panic reaction, I would expect a much wilder movement of the car.
Finally, take a look at the flag guy picture again at 2:27. There looks to be no more than a car length between the front of the car and the crowd. Even if the car doesn't accelerate from that point, even if the driver slammed on the brakes right there, it looks like there would have been a good chance he would hit some of the crowd. These pictures actually make me feel more strongly that this was an intentional act, as they seem to show the car moving along at a speed, based on videos of the event, which would have caused a collision with protesters even if the driver tried to stop from the moment he was hit by the flag.
At this point I feel fairly confident it was an intentional act, but I try to remain open to new evidence changing my opinion.