These incidents of denying entry to international visitors over seemingly minor issues illustrate the unpredictability and hostility of U.S. border enforcement. Even American citizens have been warned by their own government that re-entry could be made difficult. If that’s the case for citizens, imagine the risk for non-citizens.

Meanwhile, tech conference organizers need to re-think their venues. If you want global participation, consider hosting your events in more welcoming cities like Toronto, Vancouver, Mexico City, or Guadalajara. These destinations offer world-class infrastructure without the geopolitical baggage. Let American citizens navigate their own border policies, don’t make it your attendees' problem.

Besides, you're probably doing the Americans a favor by forcing them to get a passport.

Well what did he write? It's pretty hard to judge without knowing that. If it was something actually extreme than it would make sense to question him and deny entry.

Hillel Fuld, a pro-Israel speaker, was denied an Australian visa. So yeah, Australia is heading towards Islamism, so makes sense to deny Islamists entry to US.

https://www.timesofisrael.com/australia-blocks-visit-by-isra...