Venture capitalist Tom Perkins compared liberals’ push to reduce inequality in the United States to Nazi Germany’s war on Jews.

In a letter to the editor published in The Wall Street Journal Perkins, a founding member of Kleiner Perkins Caufield & Byers, asks whether a “progressive Kristallnacht” is coming. Perkins’s letter is in response to an editorial on speech codes at American colleges.

“Writing from the epicenter of progressive thought, San Francisco, I would call attention to the parallels of fascist Nazi Germany to its war on its “one percent,” namely its Jews, to the progressive war on the American one percent, namely the “rich,” Perkins wrote in the letter to the editor.

He continued that he perceives “a rising tide of hatred of the successful one percent. There is outraged public reaction to the Google buses carrying technology workers from the city to the peninsula high-tech companies which employ them.”

Perkins cites outrage over real-estate prices as an example of overblown liberal outrage.

“This is a very dangerous drift in our American thinking. Kristallnacht was unthinkable in 1930; is its descendent “progressive” radicalism unthinkable now?” Perkins concluded in the letter.

Perkins is listed as a partner emeritus on the Kleiner Perkins Caulfield & Byers website.

This post was updated.

Read the full letter to the editor below: