I saw this clear as day when I was watching live streams during the Portland federal courthouse protest. I would watch these for several hours per day as a form of entertainment. When I read the news articles written the following day, I was completely shocked at how much bias was present in the mainstream news media.

During these protests it essentially went like this: during the day, the protest was 100% peaceful, hardly any police. Literally a perfect 100% peaceful protest. As night came, the crowd would shift. The peaceful people would leave and then a new group would start showing up, dressed in all black and start doing full blown violence against police. Starting fires, destroying private property and many similar illegal and dangerous stuff.

The following day I read articles on CNN that said there was very little violence and it was almost entirely peaceful. This was false because there was tons of violence at the night. When you read articles in fox news they say the protest was mostly violent. This was also false because the day time protest was 100% peaceful.

This type of news reporting is pushing division politics and social media further fans the flames because people can confirm their narrative and also get false reporting from idiots on twitter/facebook which spreads misinformation.

I could also tell this is heavily influencing people's view on the world because I would debate people on reddit. For liberal people, they would link me CNN and washington post articles to support their arguments. If I argued with conservatives, they would link me fox news and breitbart articles. This is what they're linking to me as their "proof" to support their argument. If I responded by saying that fox news/cnn is biased reporting, they would jump to personal attacks at me, almost like this was their favorite football team I was bashing.