Rudy Giuliani is partially blaming people who are 'taking a knee to the national anthem' and 'burning flags' as one of the reasons that Americans are less united in comparison to right after 9/11 happened in 2001.
Back then everyone came together as Americans, and now that Trump won the presidency, the mainstream media and politicians have been forging a divide in us. Much of this, in my opinion, can be blamed on social media as well. Social media AI can sometimes surround us with people who we often agree with, and when we see something different, it's like a culture shock.
The mainstream media and their partisan hack shows are even worse, pushing only their agenda and often skewing the facts, or in some cases, making them up entirely.