This article does a poor job of explaining the incident at the very bottom of the article after painting it as negatively as possible for most of the article.

This was a nice wannabe-preacher guy who talked to people, not some protester or activist.

An actual activist-protester who had been harassing him for a long time and had tried to attack him with garbage lawsuits, got all up in his 12 year old son's face shouting obscenities and got pushed away. Apparently, the activist seen the opportunity to play the victim and finally get preacher-man. With the amount of activist judges and their fear of having their careers ruined by wealthy sociopolitical influence groups, they will likely hang this guy out to dry.

The order also bans Houck from contacting any witnesses to the alleged crimes

That's now how you permit someone to defend themselves at trial....barring them from seeking any exculpatory evidence.