The "Dark Side" comment, though tongue in cheek, wasn't right. Sorry.

I'm not a Christian and view whole concept of "sinners" as a little ridiculous as executed. To a large extent it has functioned for centuries as a control system.

The point being that within his belief system this guy isn't helping to "save" those he considers "sinners.' He's just intentionally antagonizing people, probably as a result of some personal psychological problem. And he's certainly violating New Testament teachings on which his religion is no doubt supposedly based.