I've seen a few news articles on arrests and the headlines are attention grabbing "Ivy League Student arrested for protesting" and it's worrisome to see.
However then buried in the article is something like they overstayed their visa, etc. Take a sibling comment's link to an article with a "second student arrested" in the title. As in that seems like there isn't a "large number". This is nothing like the reports of arrests in Russia. Especially as some of these pro-Palestinian protestors advocate violence or intifada pretty freely. I've seen that with my own eyes.
If I were a foreign national protesting and advocating for violence against any other country or people group I'd expect to be denied a visa or possibly deported for participating in such events. It'd be arrogant not to expect that outcome IMHO.
Visa applications in European Union countries often include things such as "indicators of good civil behavior". Take the quotes from that sibling comment's linked BBC article:
> The DHS statement says that Ms Kordia had overstayed her student visa, which had been terminated in 2022 "for lack of attendance". It did not say whether she had been attending Columbia or another institution.
> She had previously been arrested in April 2024 for taking part in protests at Columbia University, according to DHS.
> "It is a privilege to be granted a visa to live and study in the United States of America," said Homeland Security Secretary Kristi Noem in a statement.
> "When you advocate for violence and terrorism that privilege should be revoked, and you should not be in this country."