yeah reddit is a cesspool. And you get people who will try to psy-op like that all the time. It was very much like that on /pol/ as well.
The idea of it goes like this.
"I used to be on board with person x, but they finally did a,b,c and I can't stand them any more. So I switched to person y."
It doesn't have to be a centrally planned idea and can come about as a LARP or a group planning.
But the intended outcome does 1 of 2 things
-
for people supporting candidate y , in this case sanders, you can have people who support him say "SEE, SEE DRUMPF BAD AND HE IS JUST BRAINWASHING PEOPLE"
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to make people who support person x, in this case President Trump, think "hmmm if others supported him and change their mind then maybe he isn't as good as I was lead to believe.
Always remember
https://www.youtube.com/watch?v=BS5HCi-zsYE
convincing arguments right here from biden.