Censoring foreign political influence and misinformation campaigns is just sane policy.
US misinformation is no different from Russian misinformation. freedom.gov is specifically meant to spread this misinfo, freedom of speech is the stated purpose, but if you believe that, you are naive.
This is obviously an influence campaign.
It has a name: https://en.wikipedia.org/wiki/Thoughtcrime
The solution to disinformation is not censorship, it's education and to teach early people on how to critically think by themselves.
Should the Spanish government decide what is "misinformation"? Should it be forbidden to read false or misleading statements on the Internet?
How exactly does a proxy spread misinfo? Also, the project isn't even functional yet and appears to have been blocked to avert piracy