Since this was thoroughly discussed yesterday, it's probably best to treat it as off-topic here. We detached this subthread from https://news.ycombinator.com/item?id=11831759.

It's an alt-right thing. Called an "echo". It's used to highlight Jews.

Here's the recent discussion about that article when it got submitted: https://news.ycombinator.com/item?id=11826647

Checking that person's other tweets they appear to be some flavor of neo-Nazi.