It's easier to manipulate people into this than it is to get them out because making up facts is easier than correcting them. Look at how many people still believe the moon landing didn't happen. It's literally one of the easiest conspiracy theories to debunk. Debunking the flat Earth idea is also easy, but at least some of it requires a bit of math and logical thinking.
The racist ideas about crime in the US, rapes in Sweden/Europe, and immigration are harder to debunk. Not because I can link an article that debunks them, but because it's an entire cemented world view that keeps them from even looking at the article in the first place. My perspective on this is that a person with this world view has to spend time with the people of the race that they're against. And that you can't really do on an image forum.
To your other post, yes, I do concede that it has gotten better in a lot of ways. But it's my opinion that arguments aren't what made things better.