>Can't help seeing the irony that the censored document is a declaration by the publisher about how strongly they are committed to freedom of expression in international context..
Yep, and - also ironically - the root of publisher is the same as public, so you want to make something public but you restrict the access to a whole subset of the public.
Besides that, if they had written (without recurring to http 451[0]) a simple message like:
"We are sorry but we cannot serve this content due to the possible non-compliance of this site with EU Laws (GDPR)"
it would have been (IMHO) much more correct/polite.
I read the message "as is" more like:
Hallo, stupid visitor from Europe, you are denied access to the contents because you voted stupid people that wrote stupid laws that we won't respect.
The page served should be reachable even from non EU countries:
https://www.purdueexponent.org/campus/article_aa3e67de-5de9-...
and it has some interesting html keywords in "base":
<meta name="keywords" content="mitch, daniels, mitch daniels, purdue, central intelligence agency, chinese embassy, tiananmen square, zhihao kong">
<meta name="news_keywords" content="mitch, daniels, mitch daniels, purdue, central intelligence agency, chinese embassy, tiananmen square, zhihao kong">
[0] the example on Wikipedia is a good one:
https://en.wikipedia.org/wiki/HTTP_451