European countries detain and deport immigrants who are illegally present all the time. The level of it can be discussed, but what's happening in the US is that they've detained hundreds of citizens and deported immigrants who are present legally because they said something the people in charge didn't like. I'll skip that part, thanks.
on the other hand europe doesnt have roving gangs of masked gunmen violently abducting people based on ethnicity (at least not not in the last 80 years....)