What's actually happening is that what were previously localized parochialisms, individual or groupings of extremists who were isolated from one another, have become interconnected in a globalized way and have thus become, or are becoming, mainstream.
Lo que ocurre es que lo que antes eran provincialismos localizados, extremistas individuales o pequeños grupos aislados unos de otros, se han interconectado de manera global y, por tanto, se han convertido en corrientes dominantes.