The process of radicalization can be defined as that path that leads an individual to embrace an extreme, totalitarian vision that involves (as the term itself says) a “radical”, extreme solution, without compromise or dialogue, to oppose and overturn the existing order. A process which is often the prelude to violent extremism or terrorism; in simple words, the achievement of ideological goals through violent means.
As a matter of fact, “extremism” is that ideological component that can justify and support the passage to violent action (the mechanism is clearly not automatic. Not all extremists necessarily embrace violence).
In any case, waiting for a radical organization to cross over to violence means losing from the start as it implies that no adequate preventive measures have been taken.
Radicalization can have multiple expressions and it must always be analyzed on a multi-dimensional level. Without an adequate understanding of the phenomenon it is pointless to even discuss the implement de-radicalization policies in which the very concept of de-radicalization appears stiff, outdated and of little use. Extremism and terrorism are dynamic phenomenons and they require specific solutions, case by case.