This is a bad piece of journalism by Mr. Weigel, but outright bias? No.
More like laziness. He reported a stories minimum facts because it was a quick and easy piece to report.
He did not ask a non-biased bystander (police officer firefighter etc.) to account for the actual number of people at the event - this is Journalism 101.
He did not call the U.S. Army and report the angle that these soldiers were performing civil disobedience and could be disciplined for their actions.
He did not even talk to the soldiers and get a good pull out quote.
Basically a crappy online article, one I would not Drudge.