Thats just 4chan. They always threaten people and raind websites and whatnot. although there has been a case where a video of two guys beating a cat was on the internet and the people of 4chan are the ones that brought the guys to justice. the people of 4chan can be quite rude and mean but they do have their limits and do have morals on what they post.
Because fox is the most trusted news media and has not been accused for years of being biased, editing their own Wikipedia articles and removing content they don't like, altering photographs of people to where they don't look anything like the person, and using old footage for various events such as rallies and saying that the crowds present were 45,000 people + when in reality they were barely 2500.