Not shutting up when others try to silence him is admirable, but not heroic in my book.
He's no more heroic than any politician, who puts themselves in front of crowds to argue for certain policies. There's always a risk some nutjob shoots you.
Well, there have been several shootings directly outside the pizza place I work at. People have ran into my store, bleeding out. This has happened several times. My car's been stolen, I've been rammed into by text-n-drivers, wound up in the hospital. I face danger every day going into darkened neighborhoods with high crime. I continue to do it, even though it is dangerous, and bad stuff repeatedly happens to me, has injured me physically and financially.
I am not a hero. I am just a guy who is stubbornly doing his thing.
This is not heroism. Heroism is the retired firefighter who goes to ground zero on 9/12 and works 12 hour shifts digging out survivors, when nobody knew if we were getting hit again, when nobody was offering a paycheck, when it was a dangerous situation and the conditions were hazardous and people suffered long term harm, all to save lives, selflessly.
That's a hero.
Stubbornly standing up for one's political beliefs is admirable, and we should all. Doing a risky task is brave. But heroism, it is not.