I get your point here, though if I'm not mistaken they defined the boundary of what any president can be legally held accountable for while in office. It wasn't a blank check or a one-off rule only for Trump.
> People have already marched against him. Now they rightly fear for their safety.
Marching really isn't the answer if democracy truly is at stake, unfortunately. I very much dislike Trump and don't expect him to do well by our country, though I don't personally see enough to think he is actually going to tear down our democracy. Hopefully that's right and we don't get to the point of actually having to defend it.