They did sort of post it in their article. Here it is below from the article.

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The email he sent had the subject line "What's next." Streever called Lyons a "monstrous human being" and predicted the ICE leader would "go down in history as America's Reinhard Heydrich, the butcher" — a reference to the Nazi official considered to be one of the architects of the Holocaust.

"The way you are protecting the obvious execution in Minnesota, even as we see the videos, will lead to your downfall. Even Trump will turn on you before the end, and you will be a sad, despised man who eats himself alive with shame at your own pathetic weakness.

Photos of Renée Macklin Good and Alex Pretti are seen among flowers and messages at the makeshift memorial for Pretti, set up in the area where he was shot and killed by federal immigration agents, in Minneapolis. Charly Triballeau/AFP via Getty Images

"You will never know peace. You will seek to lose yourself, to escape the burden of knowing the truth about yourself. But wherever you go, you will find yourself. You will torment yourself until your last day on Earth," the email read.

I couldn't tell for sure if that was the whole email or just portions they wanted to add commentary on either so I searched around and found this article https://archive.is/PX8KO which more traditionally displays the email & confirms it is the (albeit claimed) whole thing.