The zealot in the van is probably a congregation of one - and he’s its pastor...
The other thing that puzzles me is why he thinks anyone would be attracted to the message “The Lord Kills.” This is scattered in among rather violent Bible verses and exhortations to read the Bible, which he has painted on his truck in black and red. Sounds like a real way to win people over, right?
But we get others just passing through who feel the call to leave a few tracts in the pews about how Catholics are going to Hell, etc. They’re actually rather amusing, because their complete misunderstanding of the Catholic religion and their ideas about our practices are so far off in outer space. I can’t imagine what they’d do if they saw an Orthodox or Byzantine rite church!
You should gather a few of these together and post them on a vanity thread. We can then do the apologetics for forum members who also believe this nonsense. Just think ... it would then be you who is doing the 'soul saving' :-)