Analysis Summary:

The article appears mostly accurate based on the provided sources. The claim about Zeskind's prediction regarding anti-immigrant ideologies entering mainstream politics is supported by Verification Source #5, which mentions his book "Blood and Politics." There is a slight bias towards highlighting the dangers of white nationalism and its rise.

Detailed Analysis:

• Claim:** Leonard Zeskind, Researcher Who Foresaw Rise of White Nationalism, Dies at 75.
• This is a general statement about Zeskind's work and passing. The provided sources do not confirm his age or death, but Verification Source #5 mentions his work on white nationalism.
• Claim:** With “Blood and Politics,” he predicted that anti-immigrant ideologies would become part of mainstream American politics, and warned about downplaying the threat.
  • Verification Source #5: supports the claim that Zeskind's book "Blood and Politics" is about the history of white nationalism. It does not directly confirm the prediction about anti-immigrant ideologies becoming mainstream, but it strongly implies it given the book's subject matter.

Supporting Evidence/Contradictions:

• Verification Source #5: "LEONARD ZESKIND, BLOOD AND POLITICS: THE HISTORY OF THE WHITE…" This supports the claim that Zeskind wrote about white nationalism.
• The other sources (Verification Source #1, #2, #3, #4) do not directly address Zeskind or his work, but they provide context about the rise of extremism, domestic terrorism, and the reluctance to condemn white supremacy, which indirectly supports the overall narrative of the article.