Yes.

How not? The NYT agrees with the unhelpful teacher:

'Note: People who are Hispanic are defined as those from Spanish or Portuguese culture or origin regardless of race': https://nyti.ms/2Zt4Xad (footnote)

Yet Hispanic people are seen as non-white ('regardless of race'). Add that, for the NYT, Portuguese are seen as Hispanic regardless of history. In short, 'Hispanic' is both a race and not.

I don't know, maybe Germans might be defined as Chinese or vice versa, and the NYT as a crazier supplement of Mad.

Yes, no need to say you're right, of course. It's the teacher who is wrong, and so many people who agree with her. It is only a meme.

By the way, wake me up the day somebody discovers the Europas/Africas/Asias/Oceanias (malignant blink).

For those overworried about the power of Humankind and channels: this planet is covered by human-made channels that have not, though, multiplied the number of continents.
Let's be friends and not start a war on some silly meme.
Peace for those who wished it. And for all the rest, what the heck!
Enjoy these last days of summer if you live in the Northern Hemisphere. If not, spring is coming!