In her anti-Christian piece, Coulter said that Christian missionaries do it because they are narcissistic.
She first asked “Can’t anyone serve Christ in America anymore? “
Most would rather attack the person who asked the question than consider that it might be a valid question.
She went on to provide several possible answers, including the one you pointed out.
She also pointed out that “forgetting that the first rule of life on a riverbank is that any good that one attempts downstream is quickly overtaken by what happens upstream.”