Trump is basically the galvanizing "cult of personality" figure who was able to connect with a population that was marginalized by both the government and the media -- much like Hideo Kuze was to the refugees. In the case of Trump, he energized the people, but also similar to Kuze, he can't really control every aspect of the emergent behavior (anti-semitism in Trump's case, etc). I would even say that it's similar to the Kuze storyline in that the "cult of personality" figure is actually being manipulated by a foreign power (ironically the American Empire in SAC) for their own ends.
Similar comparisons can be made with Al Qaeda, ISIS, Boko Haram, or any other movements that start with legitimate gripes but are manipulated by false information to different ends.
It's definitely not a new phenomenon, but SAC was amazingly prophetic about how it would play out in an age of instant communication. It's unfortunate that it's so difficult to approach (you won't really "get it" until your second or third watch through) -- I don't know any other show that had multiple episodes that were essentially philosophical lectures by the main characters / tachikomas .