Lumping all the Christian efforts in the same pot is a mistake.
My ophthalmologist is active part of the year with the Seventh Day Adventists, treating eye disease in Africa. A number of doctors are involved in treatments offered around the world by the SDA, and proselytization is not part of their treatments.

The old type of bible-banging missionary, those still in existence, should be consigned to the pot, a source of protein.