Can you elaborate? What was Facebook's role in this? Do you blame Facebook for not filtering out any potential fake news or did they take an active position in the matter?

The winner candidate created a well funded structure to disseminate fake news through WhatsApp. There were demands to limit the ability for a individual to spread fake news, but WhatsApp/Facebook had deaf ears.

Here are a bunch of links from reputable sourcers:

https://www.bbc.com/news/av/world-latin-america-45769992/fig...

https://www.nytimes.com/2018/10/17/opinion/brazil-election-f...

https://www.theguardian.com/world/2018/oct/18/brazil-jair-bo...

https://www.independent.co.uk/news/world/americas/brazil-ele...

http://nymag.com/developing/2018/10/whatsapp-too-late-fake-n...

https://www.telegraph.co.uk/news/2018/10/18/jair-bolsonaro-a...

It was a Conspiracy Theory created by a journalist who wrote that non-media companies were sending fake news, with no evidence to show for it. Whatsapp, which is supposed to be E2E encrypted, is the most popular app in Brazil and the government wanted Facebook to censor information, but they said no. Obviously there were false messages about every candidate in the election, not just the one the above guy didn't like. There was even a deepfake video. I can't stress how dangerous it is to ask the government to classify what is true and what is not. This is totally different from the facebook case in America because there it involved ads. Here it was messages from individuals. But sadly the left was advocating for censorship while calling the others fascists.