When this happens, many people are forced to get their news from the sites deemed 'fake'. The mass banning of opposing viewpoints (which has been happening for a couple of years now) has pushed more people towards these sites and may have actually won Trump the election. If you want to change it, stop silencing all opposing views.
The problem is that politics is in every part of our lives. If you ban politics and religion, people still get political and religious about other things. It's part of human nature (GNU VS BSD), (VI VS Emacs).