> The EU is stricter with immigration than the US. But it does not use secret police and concentration camps.
You don't think the police in Europe sometimes hide the identity of their police from onlookers when required? I'm pretty sure they do.
Do you also think Europe doesn't detain people who are in their country illegally? I'm pretty sure they do. They are even creating "return hubs", which are basically detention centers outside their own country which hold immigrants until they can be returned to their home or a third country.