That's not true, there are only two types of North Korean people you'll meet, either those that have defected and escaped North Korea or those that are agents of the state of North Korea.
There are very few defectors in existence and once they escape they're given full South Korean citizenship. This article is not about those people.
The vast majority of North Koreans outside North Korea are not defectors, instead they are controlled state assets. There are no North Korean people outside the country that are free citizens. Every single North Korean authorised to leave the country is working directly for their government often to raise money for the regime, to steal IP, to infiltrate for some nefarious purpose.
Having one of these North Korean active assets in your company is extremely dangerous, your business is now at risk of leaks, theft, or worst something being modified like added vulnerabilities that could be exploited later in cyber attacks.
So no, this article is not racist at all and really has nothing to do with the recent political situation.