To be fair, we have had a decades long problem with European genocide-doers settling in the US. There have been regular deportations of former nazis up until ju

To be fair, we have had a decades long problem with European genocide-doers settling in the US. There have been regular deportations of former nazis up until just a few years ago. There must be tens or hundreds of thousands of Europeans who have done terrorism/genocide/espionage earlier in their life and are now reintegrated into society to the point that they might want to visit Disney World. May as well ask.