The honest truth is that conservatives are never going to be strong ralliers. It's easy to get tons of people to rally when they don't have jobs or are students.
Rallies would help a bit, but politicians really only understand votes. Replacing the bad GOP senators with good ones is the only way to break this cycle. We should also focus on unseating democrats where it is feasible.
also, just to pipe in....I'm not so sure the rallies were a good thing.
They set me off today, and some of the folks I spoke with were in a similar mood.
One friend put it bluntly when he said
"If they can block traffic and march in LA, then they can certainly keep marching their angry @sses back to Mexico".
I would submit that the images of screaming thugs waving Mexican flags did little to help the cause of the "poor illegals."