of course angry
they're there on US L1 visa which is very hard to obtain but ICE still raid to fulfill their quota and get their commission

looks like they're gonna cut the plant and move it to canada/mexico

Although both options allow travel for business purposes, both the B-1 and visa waiver programs significantly restrict the work activities of users. They can’t earn income from any sources in the US, for example. But they can attend business meetings or conferences, negotiate contracts, discuss potential investments, and participate in litigation.

State Department guidelines also allow for B-1 users to travel to the US for installation or repair of machinery and equipment bought from companies outside the US. And they can supervise or train workers involved in building or construction work, but not actually do that work themselves.

Most of the Koreans 374 including the 14 others nationals have visa B1/ESTA.

Vast majority of the workers detained were mechanics installing production lines at the site, and were employed by a contractor.

If not installers, why Trump wants them to stay?

All these visa things are Gibberish Words Soup.

This is a huge factory 2,900 acre with an investment of USD$4.73 billion and going to employ 8,000 workers.
It hasn't even start operating!

Now Trump is trying to work a new "Visa" for these technicians to come back to USA, help set up & train workers to run the factory.
Which is why he was reluctant for them to fly back initially.

Korean companies would be "very hesitant" about investing in the US following the raid where workers were chains & handcuffs like slaves, South Korea's president said on Thursday.

"The situation is extremely bewildering," Lee added, while noting it is common practice for Korean firms to send workers to help set up overseas factories.

"If that's no longer allowed, establishing manufacturing facilities in the US will only become more difficult... making companies question whether it's worth doing at all," he added.

Many South Korean workers were sent to the U.S. on questionable documents despite their misgivings and warnings about stricter U.S. immigration enforcement before last week's raid on a Hyundai site, according to workers, officials and lawyers.

Many of the people arrested were skilled workers who were sent to the U.S. to install equipment at the near-complete factory on a visa waver programme, or B-1 business traveller visas, which largely did not allow work, three people said.

"It's extremely difficult to get an H-1B visa, which is needed for the battery engineers. That's why some people got B-1 visas or ESTA," said Park Tae-sung, vice chairman of Korea Battery Industry Association, referring to the Electronic System for Travel Authorization.

An equipment technician in South Korea, who previously worked with six of the people arrested, said: "I warned them they could screw up their lives if they are caught."

"I begged them not to go to the United States again," he said, speaking on condition of anonymity.

He said he had once obtained a B-1 visa from the United States by claiming he was a supervisor, rather than an equipment specialist.

In response to Reuters' questions about the allegations of immigration violations by subcontractors at the site, Hyundai Motor referred to a statement that said it has "zero tolerance for those who don’t follow the law" and would investigate the employment practices of suppliers and their subcontractors.