I think after 9/11 they were still the same old tactic they used in and after the cold war; security theater and fear mongering. But you're right, news and political representatives definitely weren't the completely open bigots that they are today though and I think you might be right about that time period being the start of today's Fox news.
Social media definitely had a profound impact on politics, people's rights, and open bigotry. This definitely gave them the means to have more of a voice with younger demographics but I'll still argue that it wasn't until Trump entered the picture that they were able to really push their narrative and decouple "truth" from official news sources in the minds of many. I don't think I've seen so many people just repeat distorted views of reality at once until then.
It's scary how most of these issues are already underway and we're still not showing any signs of slowing down.