It’s not just an issue with fake news. People believe things, both true and false without applying critical thinking.
I recently saw someone objecting to climate change being characterized as a “belief” [1] as it’s a scientific fact. Unfortunately, even with this being the case a large number of people believe in climate change because of their own inherent biases. It’s absolutely possible to hold a belief that is true for the wrong reasons. And in the long term, unless the root causes are addressed equally harmful.
[1] the context was 60% or Americans believing in climate change.