Ah yes because we didn't illegally detain them long term my point that detaining people is different then asking them to leave us bogus.

Again I repeat detaining people is not the same thing as asking them to leave and pretending it is helps no one but those who want to be ignorant.

Do you think it is legal to detain someone indefinitely for being here illegally?

After 'negotiations' by South Korea, which, going by the historical pattern, almost certainly means Trump holding those people hostage while demanding incoherent concessions from the South Korean government.