Sellner has been banned from both the US and UK for a reason. After being aligned with Nazi material in his late teens, the far-right politician has since 'limited' his discrimination to migrants trying to enter Europe and those who, according to him, "refuse to integrate." Sellner has used his voice to villainize African migrants, and now that he's gained popularity his movement is persuading the public to support closing borders and deporting both undocumented immigrants and legal citizens. He's a threat to the West and its values.
If anyone is being vilified here it's those who want to regain control of their national borders and policies. Not only has the media misrepresented Sellner's ideas, but it's even claimed that his alleged mass deportation plan is supported by mainstream parties such as Germany's AfD. Liberal regimes are trying to use Sellner as a trojan horse to ban any political pundit, politician, or party who goes against their orthodoxy. As more voters shift their support to nationalist candidates, we can expect the powers that be to suppress and even ban more opposition movements.