"By electing Benoit Hamon, France's Socialists are in keeping with current international trends. As was the case with the leftist pole of the US Democrats and Bernie Sanders and the Labour Party in the UK with Jeremy Corbyn, in their choice they have disregarded political prudence in favor of pure dogmatic ideology.
The French Socialists, too, want to be able to give themselves over to their dreams once more: of a political future where there is a radical redistribution of wealth and an end to the market economy.
The struggle around political principles that has torn the French Socialists apart in recent years and made it largely impossible for President Hollande to govern has now been settled with the selection of Benoit Hamon: The party is taking a sharp turn to the left. Hamon has been touting, for example, a tax on robots and a universal basic income. This panders to the French longing for an all-round governmental care package. And in theory, this candidate is indeed on track for some time in the future - except that his ideas have come 10 to 15 years too early.
This is because the French economy is still not very competitive and far from being settled enough to support such a radical kind of wealth redistribution. It continues to suffer from structural weaknesses, relies too heavily on a few large branches of industry and stifles the creation of medium-sized innovative companies through excessive regulation. After five years of Socialist governance, the job market is as inflexible as it always has been.
With the decision to shift to the left, France's Socialists are saying farewell to their history as a governing party. It is the end of the old dual-party system in which the conservatives and the Socialists took turns being in power. Polls predict that Benoit Hamon will get less than 10 percent of the vote in the presidential election in spring. His party, however, would rather enhance its left-wing political profile than retain any ambition, however theoretical, to become the next government. It is deliberately choosing the path into the political wilderness in the vague hope that there will be a revival of its ideals in the future.
But a glance at the desolate condition of the Labour Party in Britain, whose election chances have fallen to an all-time low, should be enough to deter them from this path. And the fact that the German Social Democrats have taken a different tack and once more selected a politician with centrist appeal does not seem to have impressed French Socialist party strategists."
dw.com
TL;DR: Normies are scared of socialist ideas and radical leftists who are ideological purists and call out SocDems as "sellouts" will make the left irrelevant in the west forever. Just look at Labour nowadays.