Screw loose types are normally solo attackers. With 2 perps this looks political to me. Occupy, anarchists, muslims, Iran, etc.
Absolutely correct. If these two are the real suspects, they are radicalized young Muslims.
Considering the target, I would say jihadis at the top of the list for two reasons:
1. This target wasn't a bank, a McDonald's, a federal office building or some symbol meaningful to Occupy or Anarchists.
The object of the attack was simply to cause injuries, death and suffering among a mass of ordinary people on the street.
2. The demeanor of the suspects in the video. They are walking in a calm and determined manner, and seem completely unperturbed and unshaken by the suffering they are about to unleash. That suggests a certain spiritual state, that is to say jihadis.
What flavor of jihadi? Hard to say.