> The government can revoke visas for legitimate immigration violations, but it’s not allowed to use immigration machinery as a pretext to punish political expression.

What is the punishment though? According to the article (written by the same person whose data was subpoenaed) they are still around, alive, safe and sound in geneva, not even formally accused of anything.

So far there is only evidence of an investigation.

And pro-pal movements arr usually pro-terrorism, so it make sense to investigate.