I don't think the problem is with the preacher getting ammo out of the hood. I think it's likely that ammo would have been used for nothing good. Anything this guy can do to get guns and ammo out of the hands of criminals has my support and gratitude.
The problem is with the language used in the story. They reported that 1500 rds of pistol ammo is a high powered ammo arsenal, and they say this as if this is an indisputable fact. While most of us here know that's just nonsense, most of the non shooting public will accept this idea without question. And this is where gun control starts.
Then the politicians and blissninnies start.
Why would anyone need more than 200 rds for target shooting?
General public..."yeah, more than that would be a high powered ammo arsenal.
Why would anyone need more than a 22 pistol and rifle for target shooting?
General public..."yeah, all you really need is a bb gun (properly registered, of course) to shoot targets.
Why would anyone need more than a lever action 30-30 to hunt deer (which you shouldn't do in the first place) or a 20 ga to shoot skeet and birds, (which you also shouldn't do).
General public..."yeah, high powered weapons are only needed to kill people"
The problem is that we can't let the ill informed establish the language of the debate before we have the debate or we'll always be on the defensive and having to answer questions that start with "Why on earth would you need (fill in blank)?