They are free to state falsehoods. However, gatherings of even a moderate size ger covered in local newspapers, which would analyze and publish their own perspectives. Generally, the larger the gathering, the higher the scrutiny.

However the new platforms allow everyone to create very large gatherings anytime. Both the size and number of these gatherings are very large, and so are their scopes. It becomes impossible for people to keep track of the content discussed in these and people then go by whatever they feel good to believe in. On a country level, this can cause huge changes, both good and bad.

Generally, racist/genocidal falsehoods are used to attack a vulnerable minority.

The interests of said minority are typically un-represented in local newspapers. The papers are often the second to cheer-lead this sort of behaviour.

On the contrary, historical tweets are often systematically picked apart.