I'll give an analogy. I had a bundle of friends who were very pro-life. They'd viewed the pictures of the aborted babies, wept buckets of tears for such as callous loss of life, and became...zealots.
For them, the cause was literally life or death, and they could not bear to stand on the sidelines. Babies were dying every day and they were the only ones, apparently, that cared enough to stop it.
I am happy to say they tempered their zeal, realizing that an anti-abortion message was negative on negative. They chose to positively support young parents instead, and opened a charity here in town where overwhelmed parents could drop off their children overnight, no questions asked. This charity garnered a lot of positive support in town.
I suggest similarly, that an evangelist in the throes of zeal, sees every life as an emergency, on the brink of life or death. Just as a fireman does not waste time on pleasantries, hucking the gasping stranger over his shoulder and removing the person from danger post-haste, a misguided, zealous evangelist may forego niceties. In his worldview, there is very little time and a very great emergency.
He may not realize that to the observer it is not of a rescue from imminent danger, but more like a slapstick routine. Very much like the well-meaning lug picking up the little old lady to cross the street, kicking and screaming, ignoring her outraged wails that she was waiting for a cab.
