Vehicle plows into crowd on Bourbon St., with 14 fatalities

I have questions. Why were there unexploded IEDs in the truck? Was there a plan to plant them that backfired? Was the plan to blow up the truck in a crowd? This was not a "woke up this morning and decided to kill people" attack. It was planned for a while because you don't just throw together an IED, it takes time, and there were more than one in the truck as well as some (reportedly) found at other locations. Every video shows the flag on the truck furled. Maybe the plan was to unfurl it before the final act that never happened because the driver ran into that equipment that was parked in the street. Maybe? And the media keeps saying an ISIS flag was found "in" the vehicle, not "on" the vehicle. Was it in the cab of the truck? What was the flag on the hitch? I know they need to investigate further and any news will be speculation because no facts will be released that might hamper the investigation, but they need to throw us something other than the man was Muslim and had an ISIS flag.
At any rate, I hope this doesn't start another Muslim hunt in the US. We don't need Mosques being burned or mass shootings with innocent people inside.