"(your) information is incomplete."
Do you have any proof Lemon conspired with the protestors? If so, I'll agree he crossed the line.
But if he was merely tipped off, and followed the group in, that's allowed.
I'd also agree Lemon crossed the line if he conducted himself as a partisan. Instead, he sought interviews with protestors and congregants alike, without inserting advocacy or diatribes.
If anyone has footage contradicting my points, please post them.
"Where do you draw the line?"
Putting your, or someone else's safety at risk.
Participating in a bank robbery can get you shot. Interrupting a religious service can get you tossed out before you get the blessing.