This article is written by Tim McMillan, who also owns the site. He's from Georgia originally, even a former Lieutenant.

He spent some time in Germany, but it doesn't appear he is originally from there.

His native language is English. There is a fair amount of credit list when grammar mistakes are made (means, usually, only a small number of people, or even just one person, looked at the copy before it was published, which is a red flag).

Just playing devil's advocate.

It's just that such mistakes are not warranted on a journal/newssite. Having flawless grammar in the language you're writing is an essential prerequisite for any journalist.