According to witnesses, the SUV was beeping its horn apparently warning bystanders... this appears to be more of the men trying to make a statement with their own deaths rather than an attack against civilians. China has long been accused to repressing non-Han Chinese ethnic groups, and the Uighurs feel that the government has targeted their group above all others.
Following the incident, tourists posted videos to Chinese social media but the government quickly hunted down these posts and videos and deleted them... within hours there were no visible signs that anything had happened.
Thoughts?