Answer:
Rise of radical parties, such as far-right or far-left, can be observed during times of crisis, either perceived or objective. In particular, economic difficulties and ultimately crises serve as an auspicious ground for radical parties, because people feel insecure about their well-being and become ready to sacrifice some freedoms to safeguard economic stability.
Such issues as unemployment and inflation are the red flags that push people towards support of radical parties, especially among those who suffer direct consequences. For example, unemployed people themselves. This could be well seen as an aftermath of the world financial crisis of 2008.