In the same vein, a racist meme shared around the internet is that supposedly some black people, while remembering their shattered ancestry, say "We were kings" [in Africa]. But a lot of white people will genuinely believe they were kings or at least related to kings.
And these erroneous class beliefs are very very common.
It even goes so far as to be used to widely support racism in the "my people" argument. Sir, sit down, statistically you were a illiterate or barely-literate peasant like the rest of us!
This is what happens when you use history as a political tool. This is how the powers that be erase class consciousness from peoples brains. They keep showing us a flawed history that almost always sides with the rulers and we adopt it. They make us forget what we are and where we come from so we side with the oppressors.