A Chinese woman’s video of her vandalizing a Korean supermarket in northeast China’s Shenyang city to express her opposition to the chain’s contribution to THAAD deployment in South Korea has sparked widespread criticism from Chinese netizens.

The 49-second clip, posted by the woman on kuaishou, a popular live streaming platform in China, showed her smashing instant noodle boxes, damaging product packaging, stealing snacks, and even flinging her middle finger in a provocative way, while a patriotic song played in the background.

The viral video invited strong backlash from the Chinese online community, with many criticizing the woman’s maleficence disguised as patriotism.

“Don’t you hooligans make nationalism your excuse?” said user @littlehawk on China’s Twitter-like Weibo.

“Boycotting Korean products? No! We should boycott such idiots first,” commented another user @Dingjiajie.

South Korean conglomerate Lotte Group has come under fire from Chinese people over the past few weeks after it agreed to provide a land in South Korea for the installation of a US anti-missile defense system. THAAD batteries, which the South Korean government has claimed will be deployed in response to the missile threat from the DPRK, have powerful radars that could be potentially used to penetrate Chinese territories.

Beijing has repeatedly protested against the THAAD deployment, but also reiterated the government’s consistent stance of welcoming foreign companies to operate in China.

The video soon caught the attention of local police, who announced that investigation into the incident is underway.

“Those people, whether stupid or evil, have tarnished the mother nation in the name of patriotism,” the police’s official Weibo account stated.