TASK DEFINITION: In this task, you are given a public comment from online platforms. You are expected to classify the comment into two classes: threat and non-threat. Threat is a statement that someone will be hurt or harmed, especially if the person does not do something in particular.
PROBLEM: Comment: Though the eugenicists of the early 20th Century didn't know about trisomy, they clearly tried to wipe out those with Down.
Now that we know better, killing those (pre-born or otherwise) with Down syndrome is not, properly, eugenics but extermination.

SOLUTION: Threat

PROBLEM: Comment: OK I have read enough of this madness. LEAVE TRUMP OUT OF THIS. I knew you had to be a dummycrat. Looking forward to the Inaugeration  when PRESIDENT DONALD TRUMP can start draining the swamp. Start with the Obamas, Oprah, Rahm Emanuel, Crooked Hilary, Harry Reid, Nancy Pelosi and moving down the food chain Roy Anthony:)

SOLUTION: Non-threat

PROBLEM: Comment: The attack in Turkey had nothing to do with the calendar. Turkey switched from the Julian calendar to the Gregorian on Jan 1, 1927. In any case this has nothing to do with Muslim services in schools. 

How far down this rabbit hole are you going to go? Or is this just further evidence that you have no rational points to raise about the actual subject of the article?

SOLUTION:
Non-threat