How were those police officers harassing him? He knew they would come, and he wanted that, otherwise he wouldn't be filming it: it would just be a video of him walking to his wife's work.

As for the police showing up when someone has an AK-47 on their back, I'd say they pretty much have to. You want the police to keep you safe, this is how they do it. They show up in situations which could potentially be deadly. I know it is his right to carry it, but it's also legal for a catholic priest to invite 20 boys to a party - doesn't mean it's not suspicious.