Retired Lt. Gen. Michael Flynn, who is reportedly President-elect Donald Trump’s pick to be national security adviser, promoted a tweet that read “Not anymore, Jews” and endorsed a racist author who claims “diversity is code for white genocide.” Former Ku Klux Klan leader David Duke has declared Flynn to be a “great pick!”

Trump’s presidential transition period has been marred by ties to white nationalism. He appointed Stephen Bannon, who has a history of pushing anti-Semitism and white nationalist “alt-right” views, to a senior White House position. Trump's entrance into politics has energized and emboldened the white nationalist movement.

Media outlets are reporting that Flynn “has been asked by Trump to serve as his national security adviser.” He is the former head of the Defense Intelligence Agency and recently became a media commentator, author, and frequent media surrogate for Trump during the 2016 campaign.

In July 2016, Flynn shared a tweet that read, “Not anymore, Jews. Not anymore.” Flynn linked to the message to claim that the “corrupt Democratic machine will do and say anything to get #NeverHillary into power.” He later apologized, deleted the tweet, and claimed it was “a mistake.”

Uh guys, Trump supporter and convention speaker @GenFlynn just retweeted an anti-Semitic tweet and endorsed it: pic.twitter.com/T1c5BtGnag — (((Yair Rosenberg))) (@Yair_Rosenberg) July 24, 2016

In February, Flynn tweeted: “Fear of Muslims is RATIONAL.”

Flynn frequently tweets at and has endorsed the work of Mike Cernovich, who is part of the white nationalist “alt-right” movement. On October 8, Flynn tweeted, “Follow Mike @Cernovich He has a terrific book, Gorilla Mindset. Well worth the read.” Cernovich is well-known within the “alt-right” movement for being a sexual assault apologist and denying the existence of date rape.

Cernovich frequently pushes white nationalist themes on his Twitter account. He’s claimed that “diversity is code for white genocide,” “Blacks use guns for murder. Whites use guns to kill themselves,” and “Diversity is bad for national security.”

David Duke endorsed Flynn for the job on Twitter. CNN's KFile reported that Flynn's son, who serves as his chief of staff, “regularly shares conspiracy theories, expletive-filled posts, and racially insensitive sentiments on Twitter and Facebook.”

Here is a sampling of Cernovich’s tweets about white genocide:

I went from libertarian to alt-right after realizing tolerance only went one way and diversity is code for white genocide. — Mike Cernovich (@Cernovich) October 28, 2015

Hint: If you want to tell me I'm wrong about white genocide in South Africa, don't tell me provable lies about free speech in SA. — Mike Cernovich (@Cernovich) November 18, 2016

White genocide in South Africa is real. Said that for years, and I'll say it now. If nominated for ambassadorship, I'll say it to Congress. — Mike Cernovich (@Cernovich) November 17, 2016

White men are killing themselves en masse and dying from stress. White genocide is real.https://t.co/YJNHI5MoeV https://t.co/eU0GYZXu8V — Mike Cernovich (@Cernovich) November 3, 2015

White genocide will sweep up the SJWs. Pretty funny that they think Muslims are going to tolerant their degenerate lifestyles. — Mike Cernovich (@Cernovich) November 1, 2015

Cernovich also reportedly tweeted -- then deleted -- that “Not being a slut is the only proven way to avoid AIDS. If you love black women, slut shame them.”

Here is a sampling of Cernovich’s tweets about African-Americans:

Detroit schools are a mess? Who runs Detroit? Blacks! #DemDebate — Mike Cernovich (@Cernovich) March 7, 2016

Where are videos of EVIL white nationalists committing HATE CRIMES. Zero. Zip. Nada. Lots of videos of blacks teens knocking out whites! — Mike Cernovich (@Cernovich) March 8, 2016

2x as many whites as blacks are killed by cops, but you won't read that in the media. https://t.co/vOIX5QIXCJ — Mike Cernovich (@Cernovich) March 9, 2016

#BlackLivesMatter won't protest 100 Chicago blacks killed each weekend. BLMW celebrates using VIOLENCE to silence a peaceful rally. #Trump — Mike Cernovich (@Cernovich) March 12, 2016

Blacks use guns for murder. Whites use guns to kill themselves. You can't talk “gun voilence” without defining terms, being honest. — Mike Cernovich (@Cernovich) June 12, 2016

Blacks kill, rob, and rape far more whites than vice versa, even when accounting for “racist” police. Stop the violence. #BlackLivesMatter — Mike Cernovich (@Cernovich) August 10, 2015

Many blacks sold slaves. Fact. But that's no more the fault of black Americans than slavery is mine. People are cruel. You own YOUR choices! — Mike Cernovich (@Cernovich) October 11, 2015

From other blacks. #1 cause of death of black men with a future is thug blacks. https://t.co/g36yzLLpot — Mike Cernovich (@Cernovich) February 5, 2016

He also repeatedly warns against diversity:

“Diversity” is code for denying me a job because of my skin color, gender, and sexual interest in women. — Mike Cernovich (@Cernovich) September 9, 2015

I went from libertarian to alt-right after realizing tolerance only went one way and diversity is code for white genocide. — Mike Cernovich (@Cernovich) October 28, 2015

How are two white woken and two black women diverse? Does diversity mean the exclusion of white men? https://t.co/Ap6XmgUo5v — Mike Cernovich (@Cernovich) February 9, 2016

It's an empirical fact that diversity leads to Balkanization. You can't deny it. Trust declines. Diversity is bad for national security. — Mike Cernovich (@Cernovich) July 9, 2016