I’ve spent enough time around religious wingnuts to know that some of them just do it out of hate and disgust. It’s not always self-disgust. Sometimes they just buy into the propaganda so deeply that any deviance is simply abhorrent and must be eradicated.
I have personally dragged a couple of people out of that mindset and they are very straight, so it was never a self-hatred thing, just a brainwashing thing.
These were planted alongside trails and on the medians of the road. This is just down the road from my house and the land these trees were on is not useful for literally anything besides trees.