[1] https://jointmathematicsmeetings.org/meetings/national/jmm20...
-------------
ICM's peak attendance is around four thousand, so 1,500 would-be attendees signing a petition to move the conference in ten days is pretty authoritative.
Further I'm not sure this is a great HN post, since it's primarily political
Entry requirements and the overhead of dealing with visa hoops are a perennial problem for international conferences, nothing new-- and presumably a part of why it hasn't been held in the US in recent memory. But the language on this petition is particularly extreme.
The lesson to be learned here is that a) protesters should realise that they are bound by the same laws as all others no matter how virtuous they consider their causes to be and that interfering with police operations comes with real risks and b) the combination of such actions by protesters with the experiences police officers have had during encounters with their targets can make them react in ways which it can be assumed they'd normally not have done. Shooting that woman did not reduce the risk for the police officer, at all. It actually increased the risk of damage to him or others because wounded or dead people behind the wheel can turn vehicles into unguided projectiles.
While it’s still convenient to gather together to discuss a field, it’s not crucial as it was in past times. Easier to do what’s best for the largest number of people.