It is not surprising that you can easily find literature that teaches how to spread Christianity, after all, that is one of the major tenets of the faith and anyone who claims to be a Christian must obey the command given by Christ before he ascended to take his place with the Father. While I am not sure who the "fundamental extremists" are you reference, anyone who shares any faith from a position of religious superiority with anything but humility is not sharing a faith, but instead propagating a man-made god who most likely was shaped in the sharer's own image.

Sylvia Cochran
Civil Rights Editor
"The Forum"