The letter addressed Muslim-Americans as "children of Satan," and warned mosque patrons to "get out of dodge."
Those are just some of the comments from the latest in a string of incidents that have seen Muslims become the target of increased hate speech and intimidation.
This time the story comes from Indianapolis, where the Islamic Society of North America says the city's Masjid Al-Fajr mosque received a threatening letter.
It promised President-elect Trump would "cleanse America," according to the Indianapolis Star.
The letter began by characterizing Muslims as devil-worshippers, saying,
You Muslims are a vile and filthy people. Your mothers are whores and your fathers are dogs. You are evil. You worship the devil. But your day of reckoning has arrived.
They then alluded to the Holocaust, implying President-elect Trump would treat Muslims the way Nazi Germany treated minority groups.
He's going to do to you Muslims what Hitler did to the Jews. You Muslims would be wise to pack your bags and get out of Dodge.
Here's the letter in its entirety.
The suggestion that Trump would engage in the types of actions the letter hints at is not rooted in fact, of course.
Since the election, the president-elect has not said anything or suggested any policy that indicates a rounding up of Muslim-Americans is imminent.
On the other hand, we'd be remiss to deny the obvious: No presidential candidate in recent memory has been as aggressive in discussing people who practice the Islamic faith as Donald Trump has been.
At a time when the FBI's annual hate crime report shows there was a 67 percent year-to-year spike in hate crimes against Muslims between 2014 and 2015, there will be a concern over how much of a negative affect that aggression has.
Hate crimes are nothing new. But hate crimes that appear specifically and transparently inspired by the success of a single figure? Those are, and it's more than fair to scrutinize the president-elect in figuring out why.