Occupy didn't make the news past 2011, and BLM protesters weren't fully adopting "abolish/defund the police" as a core of their platform in 2014. And even then the fact that Occupy was advertising to a broad-based 99% and not a scared, confused 60% (Democratic voters) says a lot.
But Sanders-style social democracy was never actually as popular as Occupy made it out be. I think Trump actually managed to pick up quite a few of the more conspiracy-minded "burn it all down" types who could have gotten on board with Occupy five years earlier.
He's always been a corporate shill. Keep in mind that he used to be a partner at Rothschild Bank, where he befriended sarkozyst guru Alain Minc who told him that "better be rich to go into politics" (and took his advice at heart, making millions off the acquisition deals he oversaw).
After that, he used François Hollande as a stepping stone (which speaks volumes in itself about the ideological state of the French socialist party) where, as minister of the Economy, he embodied the liberal shift of his government's economic policy (in which he oversaw the privatization of public assets and encouraged the deregulation of the labor code), while surreptitiously taking his distances as it increasingly sank into impopularity (his greatest trick was probably to keep his name off the aforementioned controversial labor code reform), culminating with the creation of his own party he presented as "transpartisan" and his public denial of being a socialist.
From there, at the presidential election, he played on his image of fresh dynamic face amidst the aging political class to become the catch-all candidate for all those disappointed both with the socialists' (in)action (this time, they tried to redeem themselves by picking Benoit Hamon on their left wing as candidate, which ended in disaster as he was in direct competition with Jean-Luc Mélenchon) and the right's corruption (when their candidate, François Fillon, became embroiled in a series of scandals which hurt his chances enough to make him miss the cutoff at the first round).
Only the far-left and the far-right were lucid enough to see him for what he was. Alas, Jean-Luc Mélenchon — who'd have had, of all the candidates according to the polls, the best chance to beat him, had he reached the second round — also didn't make the cut (thanks to Benoit Hamon diverting the handful of votes that'd have allowed that) and Marine Le Pen was… well, Marine Le Pen.
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