As an example of what i mean, it's been joked about for a while that arthur, the protagonist of the video game red dead redemption 2, is unreasonably "woke" "Progressive" and leftist, or in one word, marxist, for a man of his background, during that time. We are talking about an outlaw in the late 1800s who virtue signals about how he's friends with everyone of every race, drops everything he's doing to help a black doctor who got his wagon stolen while mumbling to himself about how unjust it all is, helps a feminist rally, etc. American krogan made a fantastic video on it that i believe is still on youtube, a great takedown of what is widely talked about as one of the "Greatest video games ever" if you wish to see more.
Now most people on the actual right have correctly called this out and the fact that it is obviously just a case of the writers self inserting and introducing their own 21st century political views into the character. Yet the answer to that from enjoyers of the game and leftists is that the leader of the outlaw gang taught them to be cultural marxist "progressives", colorblind feminists, etc because that is the leader's ideology.
It is like they cannot view the message from beyond the game's scope, and they think this character is a real person and a product of his environment, not a work of fiction and a vehicle for the writer's views and opinions. What causes this?
It's that simple. They cannot construct a mental model of a different era. This task is made harder by ALL media portraying historical settings trying to mirror the globohomo agenda.