Social media in particular. Its a weaponized form of peer pressure that doesnt even need an actual majority to create the illusion of consensus. Its how the US went from openly mocking and shunning fags to fags becoming normalized and then protected in under a decade. (Of course, the ground work for the fag issue was already laid by decades of normalization propaganda by television, but television couldnt create the illusion of human interaction and essentially turn every single space into an echo chamber like social media is capable of).