For twitter it's absolutely a change of policy, I think for youtube it's just so swamped that it's a hydra problem for them.
Most content regulation on social media typically rely on user reports but people have stopped caring about this stuff now.
I would say old "Nazi" stuff was mostly satirical, or informal but now most Nazi stuff is malicious, and unfortunately the fine line has been blurred.
It's hard to say, society is in a very complex situation currently, I would say it's similar to Rome, or Weimar but in all honesty, there are also new issues that are global, and really have no precedent.
Like life becoming unaffordable, unhealthy dating, microplastics, birth control, less social behaviors, less religiosity, etc.
I would like to hope, and imagine we can overcome this but Not Even The Military Industrial Complex has the capacity to find enough troops to stir up a war due to severe obesity 💀.
I think it would have to take a very charismatic, intelligent, and powerful person to motivate society to make the drastic shift, and it's really uncertain now how, who, or what could cause such a monumental societal shift if even feasible.
I believe that nature will heal as it always does but the path to that healing is currently unknown to me as of now.