Why it's not necessarily a good idea to do missionary work with a Christian organization....

... and maybe a reason for why I'm working with a secular organization.
... and why I think Christina missionaries could be more effective by explicitly becoming a member in a local church in "missionary" territory rather than having explicit ties to "home" churches in America. (don't get me wrong, personal/informal ties to Christians all over the world are definitely very fruitful.)... my host family comes to mind.

"Accordingly, any meaningful mission in Africa cannot begin with a consideration of programs, mobilization and numbers, but with the humble realization that the church has been and remains deeply connected to violence in Africa. Given this fact, how can we think about reconstruction, social renewal, or indeed resurrection in Africa? This is the question that must be at the heart of every church planning or humanitarian mission in Africa. For, when it comes to Christianity and Mission, Africa is not a tabula raza, a virgin missionary territory waiting to be discovered and onto which new, powerful, well thought out plans and programs can be written ab initio. The gospel is not new to the continent. Africa has already had a Christian past. Remembering this past, lamenting this painful past, owning it, and critically searching for a more hopeful future out of it, is what Christian reconstruction in Africa should be about."

-- by Emmanuel M Katongole, in an article in theotherjournal.com.