By the way, you do have the obligation to not “see his obvious guilt”. For instance, you cannot call someone a rapist just because you feel like it. That would be slander.
Before the beloved 2nd amendment, is the first. Courts are bound by the presumption of Innocence for the good reasons you were told already.
But your argument falls flat right at free speech; This is still fucking America, and no one is bound to believing or saying whatever another thinks by force of the government.
As always, the boundary is the consequences of your own actions (words) when taken by another.
Also, that's not how slander works you rapist of the time spent reading your drivel. Prove those damages to your reputation.