Follow the trail of posts and you’ll understand.
Also read the Facebook event page of the people who participated. This wasn’t an act of Christian witness, this was juvenile and possibly could have bordered on vandalism.
https://www.facebook.com/events/465378110190591/
Tell me from those comments there, that these were the actions of a Christian witness. It would be interesting to see if anyone did actually nail or stable these to doors and it was reported as vandalism. The police would have a field day on that page with everyone admitting to what they did and some even saying they will post photos.
Sorry, I read all the posts on your link and found nothing as you describe it.