In terms of a comparison, I would guard against letting the perfect be the enemy of the good.<quoted text>
Wars have been fought, and people have been slaughtered in the name of religious proselytizing (or what you call, marketing). Totally different history than the car industry. If Nissan had a history of persecuting others, I would advocate banning or at least limiting their outreach activities as well.
Ever hear of a fatal car-jacking?
But really, if you were looking to convert others to Christianity, which other religion would you begin with? Who makes more sense than targeting those who have already bought into the first part of the book and the underlying story?
I wouldn't bother with atheists, Muslims, Buddhists, Hindus., Wiccans....