We can have a convergence of civilizations or a clash. The first leads to prosperity, the second leads to war.
Religious switching is a common occurrence in the U.S. Depending on how “religious switching” is defined, as many as 42% of U.S. adults have switched religions. That definition counts switching between Protestant traditions, but even if Protestantism is regarded as a single group, about a third of Americans (34%) identify with a different religious group than the one in which they were raised.