Because all of these statements of ethnicity have to be contextualized.
You can't just say 'Well White this, Black that' - other than in a very American context.
I live in Quebec and they are essentially the only classical, coherent 'ethnic group' (i.e. language, governance) in North America aside from Aboriginals - and due to the fact they are surrounded by the 'Angloshphere' there is a very legit concern about the erosion of their culture.
New migrants basically don't want to learn French, and more and more English language 'everything' encroaches on the culture.
Now - some Pro-Quebec sentiment is really ridiculous, racist, over the top and frankly dumb (they want to ban 'Staples' from being called 'Staples' because it's English) but there is an underlying legitimacy.
Unspoken in all of this is that Quebec culture is defacto European and essentially (though not technically) White.
Also of interesting note that intellectually it's super-secular (they don't like their Catholic past) at the same time, culturally, kind of super Catholic.
Point being: there are calls for the 'saving of our culture' basically daily. It's part of the program here and it's not overtly racist or radical.
My MP (like Congressperson) is form 'Quebec Solidaire' and it's the very farthest Left group in North America it actually has roots in a former Communist part. (I didn't vote for them!) - but - they are equally Nationalist! They walk a tight intellectual line with justifying their Nationalism on a 'racially inclusive' basis, even though their ideology is at the same time very exclusive to outsiders, who happen to be Anglophones ... and people of colour.
In the face of Globalism 'We Are All Aboriginals' - which is to say every single culture save maybe Han Chinese is under the threat of being 'globalized' in a kind of Anglo-American hot-mess of commercialism.
So yes, it's not the same thing for some French guy to be saying such things as it is for someone from the disappearing Tribes of the Amazon, but this isn't the 20th century anymore, the fault lines are changing quickly and context is really important.
I don't see how it wasn't contexualized? They were responding to the Fourteen Words racist trash.
Mexico is a mixed race country, you will find people of all colors here, the concept of race is so weak common people are barely aware of it. There are racists who see whiter people as more beautiful, or darker (specially indigenous) people as lesser, but hate is extremely rare and frowned upon.
It's the hate part that I can't wrap my head around. Xenophobic tribes maybe hate visitors for their race, but they also could reject them for their effect in neighboring tribes, we don't know.
TL;DR: I can understand if people find Scottish people attractive, or Mexican people ugly, but I am indeed guilty of not understanding how people can actually grow hate from that.