the definition of alien is
Owing political allegiance to another country or government; foreign: alien residents.

Belonging to, characteristic of, or constituting another and very different place, society, or person; strange. See Synonyms at foreign.

Dissimilar, inconsistent, or opposed, as in nature: emotions alien to her temperament.

So its not a term that that guy invented, but im not a fan of racism either.

Although, it was very funny, also, I think it was staged, that attempt at a hit looked pretty fake.