Liberals have an intense aversity to learning, no matter how egregious their mistakes, or how much they could benefit from learning.
Anyone with more than two brain cells to rub together (which rules out most liberals) would have learned that HRC calling Trump supporters deplorables in the runup to the 2016 election had been a mistake, as it galvanized his support.
So it makes no sense for me tell libs not to post ridiculous memes like this...