China was outraged and the world shocked after separatists from Xinjiang knifed down innocent civilians at a crowded train terminal in Kunming Saturday night.

It was a typical terrorist attack and also a severe crime against the humanity.

It was China's "9-11."

Any explanation for the attack, like those in previous cases elsewhere in China, would be feeble at the bloody scene, where mothers, sons and daughters were slaughtered by strangers. Nothing justifies such a carnage against innocent civilians.

This was a random attack, with the sole purpose of causing the greatest casualties and impact within the shortest period of time.

It seems that the terrorists have had their way. Their killing spree has left 29 dead and over 130 injured, shrouding the southwestern city and the whole nation in terror.

This is not the first time that terrorists from Xinjiang launched deadly attacks over the past months, years and decades. In October 2013, Xinjiang separatists on a vehicle slammed into the Tian'anmen Square in Beijing, killing five and injuring 40.

The latest attacks in Beijing and Kunming have clearly indicated a despicable trend that separatists are targeting civilians out of Xinjiang.

It also showed a shift in their attack strategies from targeting symbols of the government, such as public security stations and police vehicles, to roadside civilians.

If the proliferation of their terrorist attack is not reined in, more innocent people will fall victim.

The latest attack showed that China's recent decision to set up a state security committee, headed by President Xi Jinping, to improve systems and strategies to ensure national security is very timely and necessary.

A nationwide outrage has been stirred. Justice needs to be done and terrorists should be punished with iron fists.

Countries and institutions such as the UN and France have condemned the attack. More voices of condemnation are expected.

Anyone attempting to harbor and provide sympathies for the terrorists, calling them the repressed or the weak, is encouraging such attacks and helping committing a crime.