I think that wide presence and apparent effectiveness of Evangelical missionaries in traditionally Catholic countries (especially in Central and South America) is a phenomenon about which Catholics in general should be concerned.
What are the fundamental issues at play in the phenomenon?
I think that one of them is the differing understanding between Catholics and Evangelicals about the meaning of baptism. Does baptism make one a Christian or not, despite the nature of the life of faith that is lived afterwards?
What can we, as Catholics, do to change this situation?
Enter into dialogue with Evangelicals so as to attempt to help them at least respect our beliefs (including those about baptism), if not necessarily agree with them?
Encourage a stronger ongoing catechesis in these countries so that when the faithful there meet Evangelical missionaries they will be well grounded in their faith and less likely to be persuaded by them?
I would be interested to read the answers to these questions and the comments of the readers on this important phenomenon in the life of the Church in the 21st century.