Immigration policies are way stricter now, and they're leaving people out. Also related, some countries are issuing warnings for people traveling to the US. https://travelnoire.com/europe-us-travel-advisory

> Immigration policies are way stricter now

Do you have any evidence of that? Have there been changes in legislation, specific directives issued?

> some countries are issuing warnings for people traveling to the US

In the case of Germany, it was emphasized that the change was not a travel warning, but instead a travel advisory [0]. Here are a few advisories from Canada, accessed 2025-04-02:

Germany: Exercise a high degree of caution in Germany due to the threat of terrorism. https://travel.gc.ca/destinations/germany

France: Exercise a high degree of caution in France due to the elevated threat of terrorism. https://travel.gc.ca/destinations/france

Italy: Exercise a high degree of caution in Italy due to the threat of terrorism. https://travel.gc.ca/destinations/italy

The State Department has a similar advisory on traveling to the UK:

> Country Summary: Terrorist groups continue plotting possible attacks in the United Kingdom. Terrorists may attack with little or no warning, targeting tourist locations, transportation hubs, markets/shopping malls, local government facilities, hotels, clubs, restaurants, places of worship, parks, major sporting and cultural events, educational institutions, airports, and other public areas. There is also a risk of isolated violence by dissident groups in Northern Ireland, focused primarily on police and military targets.

I will look at anything specific you have on hand that you feel merits attention, but I know that in the case of the German advisory, it was just updated to reflect that possessing a visa was not a guarantee of entry. So far as I know this did not come about as a result of change in policy. While the Trump administration has done a lot of chest-thumping on immigration, I haven't seen any indication that these sorts of refusals and detentions are unprecedented; they just seem to be receiving more media attention. In this instance, there were three high profile cases of Germans being refused entry and / or detained, which resulted in the advisory.

[0]: https://www.newsweek.com/germany-issues-travel-warning-us-20... ("But they also stressed that this change does not count as an official travel warning.")