I think I read stories like this from the 1930's in Germany once upon a time...

"Dear Tenants," the letter stated, "As you know the United States Government and specifically the Homeland Security Administration is investigating illegal aliens . . . I have given them all the information that I know about my tenants (age, names, work, cars, marriage, country of origin, telephone numbers, children) . . . You should expect a visit in the near future."
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Much has changed in the post-Sept. 11, 2001, world of New York. There are subway announcements advising riders to watch for suspicious people and unattended packages. There is the shared memory of attacks past and the fear of more to come. And for some of the hundreds of thousands of immigrants in the city, especially those whose visa papers are not in order, the fear is doubled. They worry about more attacks and about those who might take advantage of them in these troubled times.

"This case in the Bronx is a particularly flagrant example of what our constituency faces with some frequency," said Andrew Friedman, co-director of Make the Road by Walking, an immigrant advocacy group that has worked with tenants in Brooklyn who have received similar verbal threats from landlords. "People put up with absolutely ghastly living conditions and feel they can't complain in this security-conscious world."
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Landlord Scott Kalb, who owns a dozen buildings in the South Bronx, said in an interview that he did not write the letter. It bears his return address and telephone number, and the type font is the same as his previous letters to tenants. In the interview he referred approvingly to the letter's message.

"It's a whole, big scare thing; you're trying to turn me into a dragon landlord," he said. In reference to his tenants, he said: "You are talking about people who don't even speak English, who are illegal immigrants just like the letter says. Tell me this: What do they know?"