What does scientific (human) racism have to do with dwarves? Furthermore, no one can provide an accepted definition of what a race is scientifically.
The scientific community actually does now agree on what race is scientifically: nothing. It doesn’t exist. The very concept is scientifically bunk. Race exists only as a social construct.
How can scientific racism exist as an except when we don't even know what a race is? The whole thing is a little confusing to me. If scientific racism can't stand on its own two feet as a theory, why should we care if it influences anything?
Because despite having been discredited, the misconception of race as a biological distinction between humans persists. And not just among bigots who cling to outdated theories of race to justify their worldviews (though there are plenty of those) but ordinary, well-meaning but misguided people. There’s an example for you of people’s worldviews being informed by more than pure logic and evidence right there.
What does it have to do with dwarves in a fantasy setting? Because almost all of fantasy media continues to propegate the myth of biological race. People are constantly and uncritically exposed to the concept in media they enjoy, normalizing it and making it easier to accept.
Why must a work have a message?
Because that’s how communication works. All communication expresses meaning, whether we intend it to or not. Better to be conscious and purposeful with the messages we put out into the world than try to pretend we can tell stories that have no meaning.
If a work does have a message, isn't consuming said media consent to allow that piece of media to influence you?
Why yes, which is why critical analysis is important. We are all influenced by the media we consume, but if we are critical of that media, we have more control over how we are influenced by it.
Are they? Can we not guard ourselves? Is there no defense?
Yes, it’s called critical analysis.
I'm sure. Some people seem to be more easily influenced than others, which means some people are able to guard themselves - at least to some extent.
You know what the difference is? The people who are more easily influenced are the ones without conscious awareness of the messages in their media. That’s why it’s important to acknowledge these things when we see them.
Alternatively, we could train ourselves to discard emotions. Soldiers seem to be able to do it; military training teaches them to compartmentalize. Navy Seals don't cry when a terrorist goes down, but they do when one of their own takes a bullet.
And it is deeply, horrendously psychologically damaging.
Why not do the same thing with media? Compartmentalize reality and fantasy?
We can. But it’s difficult to compartmentalize a facet of a work that you aren’t consciously aware of. So we analyze our media, we identify the messages they express, and we critique the messages we find to be harmful.