Number three answer is long...
Speaking as a DC Chapter member who has gone up against these America-hating leftists at least 10 times since September 29, 2001 - we never resort to violence; we always beat them with the truth.
I think it hurts them more when we greet them with signs that: mock their lunatic causes, ridicule their puppet shows, identify their communist leaders, point out the governments around the world (Cuba, N. Korea, Communist China, Iraq, PLO, etc.) who help fund their "peace" rallies, praise OUR leaders, encourage them to move to Cuba (and elsewhere) for the free medical care, etc. --- not to mention all the fun we have turning their asinine chants around on them.
There will be time to do that kind of thing. DC Chapter members would be deeply disappointed if we didn't have time for that.