Piper drowns out hate preacher.

[Reiver]

I agree! And I hope that you'll stand just as firmly with me in support of the piper's right to counter-demonstrate!

Yes, to a point.
Listening and presenting an opposing view is debate.

Drowning out your opponent, as I've often seen on college campus's, by shouting, chanting to the point they cannot be heard is a detriment to free speech.

I'm sure the young Piper meant well and he did 'get involved' when there was an issue he could not abide....a slightly lesser approach maybe.