The problem is when certain groups take the definition of harmful speech beyond all reasonable limitations. Certain powerful groups spoke of favorably by the media would designate the Google memo as harmful hate speech that needs to be suppressed. Then they will go one step further and say sympathizing with the memo is also naturally a form of harmful speech. We've already slid too far down this slope. I expect in the future I will be mandated to clap and bawl uncontrollably while my great liberal leader makes a speech on pain of death for the crime of facism

No, that isn't a problem. JSM also defined the Offense Principle, which doesn't trump freedom of speech. You're free to whinge about future hypothetical scenarios of you crying in front of liberal leaders so long as it doesn't cause harm.

Can someone please explain to me what is the modern day freedom of speech?

I know the 1st amendment protects Americans from the government but today's free speech advocates, warriors, or whatever they are called look a bunch of angry men.