“What makes you think that he would be set on destroying the Bill of Rights?”
You just cannot be serious with that litany.
Once Trump rents the hall, it is his, it is private property, and he is the one with free speech rights. As Reagan so famously reminded a disruptor, he paid for the mike. And on other occasions, he sharply ordered them to “shut up”. Was Reagan taking away their first amendment rights?
I have seen protesters not very gently dragged out of school board meetings.
If someone uninvited came into your home, would you kick them out?
In any event, no matter how you define the venue, Trump does not have the right to inflict violence or to incite violence except in self-defense or in defense of another. He does not have the right to run a gang of brownshirts beating up members of the audience. Nor does he have the right to compel silence in the audience by violence although he might have the right to remove disruptors but that is a different matter.
Trump's disgraceful comments which I have catalogued raise a well-founded fear that as president of the United States he would invoke the powers of government, not excepting physical violence, to suppress free speech. There is nothing in Donald Trump's character that suggests he warrants taking such a risk in fact everything points in the contrary direction.