UPDATE: Fromt he map, it's hard to conclude anything about his targeting. Most of the Jewish targets are to the west or south of the attack zone, and Federation is down by the waterfront, far out of the way. If he was heading west when he was stopped, then that might point to a little more intent. At the same time, two things to bear in mind: 1) most - though not all - of the targets to the west are synagogues, which are unlikely to have lots of people hanging around mid-day during the week, and 2) the JCC, but not nearby Shearith Israel and Temple Emanu-El would likely have had people hanging around during the day. The question is how much of this, if any, Popal knew.
Here's a map of the San Francisco SUV attacks from yesterday.
If someone with better knowledge of the area can send me a list of nearby Jewish sites, I'll overlay them on the map.
At the same time, Wizbang Blog has more, and a commenter suggests possible family connection between the driver and the 1999 murder of a 24-year-old honors student from Queens.